cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15468/dl.u8nk4v
title: Occurrence Download

description: A dataset containing 24239 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Leucoma salicis Linnaeus, 1758, Lithophane leautieri Boisduval, 1829)",
 "Geometry POLYGON((-9.36035 44.71551,-10.59082 42.81152,-11.82129 36.80928,-7.69043 36.17336,-3.38379 35.88905,3.12012 38.13456,9.18457 38.20366,11.7334 37.16032,12.78809 34.74161,17.09473 33.79741, 23.15918 34.23451,30.10254 32.62087,33.2666 32.99024,35.72754 35.03,33.00293 35.53223,28.69629 35.17381,28.34473 36.31513,25.7959 37.50973,24.91699 39.90974,28.78418 40.6473,30.71777 41.17865,36.87012 45.213,38.18848 46.98025,38.71582 47.7541,39.94629 47.93107,40.20996 49.61071,37.0459 50.34546,35.72754 50.40152,33.79395 52.26816,31.68457 51.94426,31.4209 53.27835,32.56348 53.43572,30.98145 54.77535,30.89355 55.52863,28.43262 56.02295,27.20215 57.65716,27.37793 58.30949,27.90527 59.17593,29.66309 59.88894,27.6416 60.58697,31.50879 62.75473,28.78418 69.83962,30.89355 70.28912,29.22363 71.55274,21.75293 71.30079,14.28223 70.14036,11.38184 67.47492,4.87793 63.66576,-5.53711 71.52491,-10.63477 71.69129,-21.5332 67.74276,-28.56445 65.36684,-24.3457 61.35461,-9.36035 44.71551))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Year is greater than or equal to 1980",
 "Year is less than or equal to 2021"
 ]
}

 The dataset includes 24239 records from 135 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0169263-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25549/inscriptifact-ouc111113343
title: Butcher's bill, UT 1599-10

description: [Text Description:] Butcher's bill: sheep, goat, lamb. ❧ [Text or Publication Number Note:] UT 1599-10 ❧ [Excavation Description:] Drehem ❧ [Medium:] Clay ❧ [Script Note:] Cuneiform, Non-Alphabetic ❧ [Physical Object Description:] Small clay tablet, beige-brown color. LABEL: "1599" in pencil, "10" in black ink. 2 x 2cm.
DOI: 10.15468/dl.9xxtap
title: Occurrence Download

description: A dataset containing 401 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Keysseria Lauterb."
 ]
}

 The dataset includes 401 records from 18 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0203811-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.gzrr3j
title: Occurrence Download

description: A dataset containing 20 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Heterocoma gracilis Loeuille, J.N.Nakaj. & Semir"
 ]
}

 The dataset includes 20 records from 12 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0061749-240506114902167/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25549/inscriptifact-ouc111113390
title: Butcher's bill, UT 1599-10

description: [Text Description:] Butcher's bill: sheep, goat, lamb. ❧ [Text or Publication Number Note:] UT 1599-10 ❧ [Excavation Description:] Drehem ❧ [Medium:] Clay ❧ [Script Note:] Cuneiform, Non-Alphabetic ❧ [Physical Object Description:] Small clay tablet, beige-brown color. LABEL: "1599" in pencil, "10" in black ink. 2 x 2cm.
DOI: 10.25549/inscriptifact-ouc111113468
title: Butcher's bill, UT 1599-10

description: [Text Description:] Butcher's bill: sheep, goat, lamb. ❧ [Text or Publication Number Note:] UT 1599-10 ❧ [Excavation Description:] Drehem ❧ [Medium:] Clay ❧ [Script Note:] Cuneiform, Non-Alphabetic ❧ [Physical Object Description:] Small clay tablet, beige-brown color. LABEL: "1599" in pencil, "10" in black ink. 2 x 2cm.
DOI: 10.15468/dl.jw833k
title: Occurrence Download

description: A dataset containing 11947 species occurrences available in GBIF matching the query:
{
 "and" : [
 {
 "or" : [
 "PublishingCountry is Colombia",
 {
 "and" : [
 "Country is Colombia",
 {
 "not" : {
 "Issue" : [
 "is Country coordinate mismatch"
 ]
 }
 }
 ]
 }
 ]
 },
 {
 "and" : [
 "BasisOfRecord is one of (Specimen)",
 "TaxonKey is one of (Anolis Daudin, 1802)"
 ]
 }
 ]
}

 The dataset includes 11947 records from 81 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0173605-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25549/inscriptifact-ouc111354062
title: List, PNN, KTU 4.628

description: [Text Description:] Ugaritic Tablet KTU 4.628 ❧ [Text or Publication Number Note:] KTU 4.628; KTU2 4.628; KTU3 4.628; CTU 4.628; CAT 4.628; RS 19.060; DO 5047 ❧ [Excavation Description:] Found during excavations at Ras Shamra. ❧ [Medium:] Clay ❧ [Script Note:] Alphabetic Cuneiform
DOI: 10.25549/inscriptifact-ouc111354067
title: Record, quantities of agricultural tools and numbers of working personnel by place of residence and royal farm, KTU 4.625

description: [Text Description:] Ugaritic Tablet KTU 4.625 ❧ [Text or Publication Number Note:] KTU 4.625; KTU2 4.625; KTU3 4.625; CTU 4.625; CAT 4.625; RS 19.052; DO 5039 ❧ [Excavation Description:] Found during excavations at Ras Shamra. ❧ [Medium:] Clay ❧ [Script Note:] Alphabetic Cuneiform
DOI: 10.25549/inscriptifact-ouc111113398
title: Butcher's bill, UT 1599-10

description: [Text Description:] Butcher's bill: sheep, goat, lamb. ❧ [Text or Publication Number Note:] UT 1599-10 ❧ [Excavation Description:] Drehem ❧ [Medium:] Clay ❧ [Script Note:] Cuneiform, Non-Alphabetic ❧ [Physical Object Description:] Small clay tablet, beige-brown color. LABEL: "1599" in pencil, "10" in black ink. 2 x 2cm.
DOI: 10.15468/dl.wvw3sa
title: Occurrence Download

description: A dataset containing 12536 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Elymus elymoides (Raf.) Swezey, Linanthus pungens (Torr.) J.M.Porter & L.A.Johnson, Erigeron vagus Payson, Carex rossii Boott, Astragalus kentrophyta A.Gray)",
 "Geometry POLYGON((-180 15, -180 90, -20 90, -40 15, -180 15))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 12536 records from 117 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0178591-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.c96dzu
title: Occurrence Download

description: A dataset containing 178 species occurrences available in GBIF matching the query:
{
 "and" : [
 "OccurrenceStatus is Present",
 "TaxonKey is Lithocarpus pachyphyllus (Kurz) Rehder"
 ]
}

 The dataset includes 178 records from 25 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003198-250227182430271/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.63h7nv
title: Occurrence Download

description: A dataset containing 10 species occurrences available in GBIF matching the query:
{
 "and" : [
 "DatasetKey is EOD – eBird Observation Dataset",
 "GadmGid is TZA.6.8.2_1",
 "TaxonKey is Passeriformes",
 "Year 1994-2023"
 ]
}

 The dataset includes 10 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003132-250227182400228/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.gz6v2e
title: Occurrence Download

description: A dataset containing 80 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Gnetales)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Year is greater than or equal to 1981",
 "Geometry POLYGON((-30 25,50 25,50 75,-30 75,-30 25))"
 ]
}

 The dataset includes 80 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003133-250227182400228/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.8a5tzw
title: Occurrence Download

description: A dataset listing the 18 species recorded in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((-99.77529 19.2567,-99.77573 19.26035,-99.77931 19.26041,-99.78549 19.25571,-99.78821 19.25009,-99.78856 19.24307,-99.80481 19.24105,-99.80963 19.23749,-99.81366 19.23936,-99.82751 19.23775,-99.83497 19.23355,-99.83982 19.22842,-99.84648 19.22964,-99.84989 19.22494,-99.86399 19.22264,-99.86744 19.22466,-99.86914 19.23013,-99.87402 19.23132,-99.87461 19.23389,-99.87936 19.23486,-99.89348 19.22759,-99.89549 19.22082,-99.9013 19.21524,-99.90368 19.2155,-99.90658 19.21305,-99.90999 19.20789,-99.9063 19.20036,-99.90717 19.18973,-99.91707 19.16586,-99.91598 19.15928,-99.91778 19.15048,-99.91548 19.14546,-99.91335 19.14453,-99.91161 19.14926,-99.90895 19.15149,-99.90728 19.15146,-99.90566 19.1485,-99.90163 19.14753,-99.89398 19.15309,-99.89186 19.15148,-99.88809 19.15202,-99.88321 19.15612,-99.87363 19.15507,-99.87186 19.15074,-99.86851 19.15137,-99.86373 19.14791,-99.85972 19.13963,-99.85106 19.13015,-99.83947 19.13013,-99.84188 19.12836,-99.84098 19.12007,-99.8288 19.11707,-99.82632 19.11842,-99.81283 19.11775,-99.80828 19.11428,-99.80855 19.11205,-99.80472 19.11358,-99.79972 19.11325,-99.78815 19.10674,-99.77979 19.1082,-99.76891 19.10351,-99.76936 19.10899,-99.76703 19.1162,-99.77721 19.12866,-99.78335 19.13257,-99.7877 19.13821,-99.79137 19.1471,-99.79392 19.16639,-99.79837 19.17143,-99.79898 19.17778,-99.80268 19.18463,-99.80354 19.19076,-99.80271 19.19777,-99.80029 19.19977,-99.79878 19.20473,-99.7947 19.20648,-99.77752 19.22208,-99.77598 19.22908,-99.77743 19.24246,-99.77573 19.24402,-99.77529 19.2567))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Amphibia"
 ]
}

 The dataset's 18 records were derived from 15 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003130-250227182400228/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.dfyvjx
title: Occurrence Download

description: A dataset containing 20601 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Ephedrales)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Year is greater than or equal to 1981",
 "Geometry POLYGON((-30 25,50 25,50 75,-30 75,-30 25))"
 ]
}

 The dataset includes 20601 records from 295 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003135-250227182400228/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.yvy3am
title: Occurrence Download

description: A dataset containing 12961 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Asplenium rhizophyllum L."
 ]
}

 The dataset includes 12961 records from 219 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003134-250227182400228/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.tpftgn
title: Occurrence Download

description: A dataset containing 4551 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Eichhornia crassipes (Mart.) Solms)",
 "BasisOfRecord is one of (Machine Observation, Human Observation, Observation, Literature Occurrence)",
 "HasCoordinate is true"
 ]
}

 The dataset includes 4551 records from 145 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003136-250227182400228/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.ku2ygn
title: Occurrence Download

description: A dataset containing 4555 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Asplenium montanum Willd."
 ]
}

 The dataset includes 4555 records from 150 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003137-250227182400228/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.hqfe8e
title: Occurrence Download

description: A dataset containing 29872 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Arecales)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Year is greater than or equal to 1981",
 "Geometry POLYGON((-30 25,50 25,50 75,-30 75,-30 25))"
 ]
}

 The dataset includes 29872 records from 240 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003138-250227182400228/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.ntar62
title: Occurrence Download

description: A dataset containing 110 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Specimen",
 "TaxonKey is Lepanthes elata Rchb.f."
 ]
}

 The dataset includes 110 records from 20 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003202-250227182430271/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.ads4at
title: Occurrence Download

description: A dataset containing 23637 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Commelinales)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Year is greater than or equal to 1981",
 "Geometry POLYGON((-30 25,50 25,50 75,-30 75,-30 25))"
 ]
}

 The dataset includes 23637 records from 262 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003139-250227182400228/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.k382w5
title: Occurrence Download

description: A dataset containing 33346 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Asplenium platyneuron (L.) Britton, Sterns & Poggenb."
 ]
}

 The dataset includes 33346 records from 245 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003201-250227182430271/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.c4hdgc
title: Occurrence Download

description: A dataset containing 17 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Lepanthes ionoptera Rchb.f."
 ]
}

 The dataset includes 17 records from 10 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003140-250227182400228/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.v63q9g
title: Occurrence Download

description: A dataset containing 65833 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is France",
 "Geometry POLYGON((4.63127 44.84424,7.5505 44.84424,7.5505 46.81983,4.63127 46.81983,4.63127 44.84424))",
 "KingdomKey is Animalia",
 "Year is 2024"
 ]
}

 The dataset includes 65833 records from 24 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0020885-250402121839773/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.13145/bacdive10228.20241212.9.2
title: Nannocystis exedens Reichenbach 1970

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.13145/bacdive10228.20251217.10
title: Nannocystis exedens Reichenbach 1970

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.13145/bacdive10229.20241212.9.2
title: Nannocystis exedens Reichenbach 1970

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.13145/bacdive10229.20251217.10
title: Nannocystis exedens Reichenbach 1970

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.15156/bio/sh0078274.10fu
title: SH0078274.10FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.
DOI: 10.15156/bio/sh0078275.10fu
title: SH0078275.10FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.
DOI: 10.13145/bacdive10230.20241212.9.2
title: Nannocystis exedens Reichenbach 1970

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.13145/bacdive10230.20251217.10
title: Nannocystis exedens Reichenbach 1970

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.15156/bio/sh0078276.10fu
title: SH0078276.10FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.
DOI: 10.13145/bacdive10231.20241212.9.2
title: Nannocystis exedens Reichenbach 1970

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.13145/bacdive10231.20251217.10
title: Nannocystis exedens Reichenbach 1970

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.15156/bio/sh0078277.10fu
title: SH0078277.10FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.
DOI: 10.13145/bacdive10232.20241212.9.2
title: Nannocystis exedens Reichenbach 1970

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.13145/bacdive10232.20251217.10
title: Nannocystis exedens Reichenbach 1970

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.
DOI: 10.15156/bio/sh0078278.10fu
title: SH0078278.10FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.
DOI: 10.13145/bacdive10233.20241212.9.2
title: Nannocystis exedens Reichenbach 1970

description: The range of data encompasses taxonomy, morphology, physiology, sampling and concomitant environmental conditions as well as molecular biology.