ralfinamide
A drug under investigation for the treatment of neuropathic pain and other pain conditions.

raltitrexed
A particular drug used in chemotherapy.

ramnulokinase
Misspelling of rhamnulokinase.

ramorelix
a drug that acts as an LHRH antagonist.

ranalexin
An antimicrobial peptide present in the skin of the bullfrog Rana catesbeiana

ranaspumin
A surfactant protein found in the foam nests of tropical frogs.

ranaspumins
plural of ranaspumin

raseglurant
A drug developed to treat migraine, gastroesophageal reflux disease, and dental anxiety, but discontinued because of possible predictive signs of hepatotoxicity.

razoxane
A particular chelating drug.

reagin
An antibody.
A substance elaborated by the spirochetes of syphilis and yaws, having the property of uniting with lipoids, and of fixing complement.

reagins
plural of reagin

recombinase
Any of several enzymes that mediate recombination of DNA fragments among chromosomes

recombinases
plural of recombinase

recoverin
A calcium-binding protein found in the photoreceptor cell of the eye.

redoxase
Any enzyme that catalyses a redox reaction

redoxases
plural of redoxase

reductoisomerase
Any enzyme that catalyzes a reaction involving both reduction and isomerization

reductoisomerases
plural of reductoisomerase

refoldase
Any enzyme that catalyzes refolding of a protein

refoldases
plural of refoldase

regucalcin
A calcium-binding protein that is preferentially expressed in the liver and kidney and may be associated with aging.

regucalcins
plural of regucalcin

relaxant
A drug or other agent that promotes relaxation.

relaxants
plural of relaxant

relcovaptan
A certain vaptan drug proposed for the treatment of Raynaud's disease, dysmenorrhoea, and tocolysis.

remacemide
A drug that acts as a low-affinity NMDA antagonist with sodium channel blocking properties.

renin
A circulating enzyme released by mammalian kidneys that converts angiotensinogen to angiotensin I. Due to its activity which ultimately leads to the formation of angiotensin II and aldosterone, this hormone plays a role in maintaining blood pressure.

renins
plural of renin

reptin
An ATPase that is a component of telomerase

resibufogenin
Alternative form of bufogenin.

resilin
An elastic protein found in the exoskeletons of insects, facilitating, for example, folding wings or jumping relatively great distances.

resolvase
Any of a group of enzymes that repress transposases

resolvases
plural of resolvase

resorantel
An anthelminthic drug.

retelliptine
An antineoplastic drug.

reticulocalbin
A calcium-binding protein from the lumen of the endoplasmic reticulum

reticulocalbins
plural of reticulocalbin

retinosome
A lipid organelle present in retinal epithelium

retinosomes
plural of retinosome

retrotransposase
Any enzyme that catalyses retrotransposition

retrotransposases
plural of retrotransposase

rhamnogalacturonanase
Any enzyme that catalyses the hydrolysis of a rhamnogalacturonan

rhamnogalacturonanases
plural of rhamnogalacturonanase

rhamnogalacturonase
Any enzyme that catalyses the hydrolysis of a rhamnogalacturonan.

rhamnogalacturonases
plural of rhamnogalacturonase

rhamnosidase
Any enzyme that catalyzes the hydrolysis of a rhamnoside.

rhamnosidases
plural of rhamnosidase

rhamnosyltransferase
Any transferase that transfers a rhamnosyl group

rhamnosyltransferases
plural of rhamnosyltransferase

rhamnulokinase
A transferase enzyme that catalyzes the chemical reaction ATP + L-rhamnulose ⇌ ADP + L-rhamnulose 1-phosphate.

rhamnulokinases
plural of rhamnulokinase

rhicadhesin
A membrane protein in Rhizobium

rhinocerosin
An antibacterial protein present in larvae of a rhinoceros beetle, Oryctes rhinoceros

rhodanase
A mitochondrial enzyme that detoxifies cyanide by converting it to thiocyanate

rhodanese
A mitochondrial enzyme that catalyzes the conversion of cyanide to thiocyanate. Probably from ῥόδον (ródon), meaning rose, in reference to rhodanic acid which has a red colour with ferric salts.

rhodomyrtone
An antibacterial drug, 6,8-dihydroxy-2,2,4,4-tetramethyl-7-(3-methyl-1-oxobutyl)-9-(2-methylpropyl)-4,9-dihydro-1H-xanthene-1,3(2H)-di-one, isolated from rose myrtle (Rhodomyrtus tomentosa)

rhodonase
Misspelling of rhodanase.

rhotekin
A scaffold protein that interacts with Rho proteins

riboguanosine
A nucleoside composed of ribose and guanosine

riboguanosines
plural of riboguanosine

ribohydrolase
Any enzyme that catalyses the hydrolysis of a riboside

ribohydrolases
plural of ribohydrolase

ribokinase
A transferase enzyme that catalyzes the chemical reaction ATP + D-ribose ⇌ ADP + D-ribose 5-phosphate.

ribokinases
plural of ribokinase

ribonuclease
Any of a group of enzymes that catalyze the hydrolysis of ribonucleic acid.

ribonucleases
plural of ribonuclease

ribonucleoside
Any nucleoside component of RNA.

ribonucleosides
plural of ribonucleoside

ribonucleotidase
Any enzyme that catalyses the dephosphorylation of a ribonucleotide

ribonucleotidases
plural of ribonucleotidase

ribonucleotide
Any nucleotide having ribose as its sugar

ribonucleotides
plural of ribonucleotide

ribonucleotoxin
Any toxin that interferes with the translation of RNA

ribonucleotoxins
plural of ribonucleotoxin

ribosylhydrolase
Any of a class of hydrolase enzymes that remove ribose moieties

ribosylhydrolases
plural of ribosylhydrolase

ribosyltransferase
Any transferase that transfers ribosyl groups

ribosyltransferases
plural of ribosyltransferase

ribotide
Synonym of ribonucleotide.

ribotides
plural of ribotide

ribotransferase
Alternative form of ribosyltransferase.

ribotransferases
plural of ribotransferase

ribulokinase
A transferase enzyme that catalyzes the chemical reaction ATP + L(or D)-ribulose ⇌ ADP + L(or D)-ribulose 5-phosphate.

ribulokinases
plural of ribulokinase

ricin
An extremely toxic lectin extracted from the castor bean.

rimegepant
An investigational drug for the treatment of migraine.

rimonabant
An anti-obesity drug which acts as an appetite suppressant.

risdiplam
A drug for the treatment of spinal muscular atrophy.

robinose
A disaccharide composed of 6″-O-α-rhamnopyranosyl-β-galactopyranoside; the sugar moiety of robinin.

rocovitine
Misspelling of roscovitine.

roflumilast
A particular antiinflammatory drug

rolziracetam
A nootropic drug of the racetam family.

romifidine
A veterinary sedative N-(2-bromo-6-fluorophenyl)-4,5-dihydro-1H-imidazol-2-amine

romiplastin
Synonym of romiplostim.

romiplostim
A fusion protein analog of thrombopoietin.

roscovitin
Alternative form of roscovitine.

roscovitine
A drug currently (2006) on trial for the treatment of leukemia, herpes and HIV infection.

royalisin
A defensin-like peptide found in royal jelly.

ruberythrin
Misspelling of rubrerythrin.

rubitecan
A particular drug designed to treat cancer.

ruboxistaurin
A bisindolylmaleimide that inhibits protein kinase

rubrerythrin
A non-haem iron protein involved in oxidative stress tolerance in anaerobic bacteria

rubrerythrins
plural of rubrerythrin

rucaparib
A drug being developed as a cancer treatment.

rucinol
A particular resorcinolic lipid.

rusticyanin
A copper-containing protein involved in electron transfer, being a strong oxidant.

rusticyanins
plural of rusticyanin

rutinose
A disaccharide, consisting of rhamnose and glucose, derived from rutin.

rutinulose
A particular disaccharide.

ryanotoxin
A peptide having properties similar to that of ryanodine.

sabcomeline
A drug that acts as a selective M₁ receptor partial agonist.

sabeluzole
A nootropic and neuroprotective drug.

saccharobiose
Any disaccharide, but especially sucrose

sacubitrilat
The active metabolite of the antihypertensive drug sacubitril.

safingol
A lyso-sphingolipid protein kinase C inhibitor.

salamandarin
A toxin produced by salamanders.

salazosulfadimidine
A sulfonamide antiinfective drug.

salazosulfamide
A sulfonamide antiinfective drug.

salubrinal
A drug that protects cells from apoptosis