bluuebunny/crossref_metadata_2025_split huggingface dataset:
The First Organocatalytic Addition of 2‐Trimethylsilyloxyfuran to Carbonyl Compounds: Hydrogen‐Bond Catalysis in γ‐Butenolides Synthesis.
Authors: De Rosa Margherita , Citro Lucia , Soriente Annunziata 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Organometallic Approach to the Functionalization of Alkyl Groups Containing 1‐Phenylpyrroles.
Authors: Faigl Ferenc , Vas Feldhoffer Bernadett , Thurner Angelika 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Reaction of (1,3‐Dioxo‐2,3‐dihydro‐1H‐inden‐2‐ylidene)propanedinitrile with N‐Arylisoindolines.
Authors: Doepp Dietrich , Hassan Alaa A. , El‐Din Ahmed M. Nour , Mourad Aboul‐Fetouh E. , Lehmann Christian W. , Rust Joerg 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
The Crucial Role of the Nitrogen Substituent in the Desymmetrization of Cyclic meso‐Imides Using B‐Me and B‐O‐Me Oxazaborolidine Catalysts.
Authors: Barker Mike D. , Dixon Rachel A. , Jones Simon , Marsh Barrie J. 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
L‐Proline‐Catalyzed Asymmetric Aldol Condensation of N‐Substituted Isatins with Acetone.
Authors: Chen Gang , Wang Ye , He Hongping , Gao Suo , Yang Xiaosheng , Hao Xiaojiang 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Regioselective Reaction of 2‐Indolylcyanocuprates with Electrophiles.
Authors: Ishikura Minoru , Uemura Reina , Yamada Koji , Yanada Reiko 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Convergent Synthesis of Azabicycloalkenones Using Squaric Acid as Platform.
Authors: Yamamoto Yoshihiko , Kuwabara Shoji , Hayashi Hiroki , Nishiyama Hisao 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Enantioselective 1,3‐Dipolar Cycloaddition of Nitrile Imines to α‐Substituted (I) and α,β‐Disubstituted (IV) α,β‐Unsaturated Carbonyl Substrates: A Method for Synthesizing Dihydropyrazoles Bearing a Chiral Quaternary Center.
Authors: Sibi Mukund P. , Stanley Levi M. , Soeta Takahiro 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Stereocontrolled Synthesis of Functionalized cis‐Cyclopentapyrazolidines by 1,3‐Dipolar Cycloaddition Reactions of Azomethine Imines.
Authors: Gergely Joshua , Morgan Jeremy B. , Overman Larry E. 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Microwave‐Assisted Solid‐Phase Synthesis of 2,4,5‐Triaryl Imidazoles in Solventless System: An Improved Protocol.
Authors: Oskooie Hossein A. , Alimohammadi Zahra , Heravi Majid M. 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Short and Efficient Diastereoselective Synthesis of Enantiopure 1‐Substituted 1H‐2‐Benzopyrans.
Authors: Pedrosa Rafael , Sayalero Sonia , Vicente Martina 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Gold Catalysis: Dihydroisobenzofurans and Isochromans by the Intramolecular Furan/Alkyne Reaction.
Authors: Hashmi A. Stephen K. , Woelfle M. , Ata Filiz , Hamzic Melissa , Salathe Ralph , Frey Wolfgang 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Ketene Acetal Chemistry. Part 4. Condensation of α‐Aroylketene Dithioacetals and 2‐Hydroxyarylaldehydes Results in Facile Synthesis of a Combinatorial Library of 3‐Aroylcoumarins.
Authors: Rao H. Surya Prakash , Sivakumar S. 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Divergent Synthetic Strategy Leading to Structurally Diverse Pyrrolidines and Piperidines from Common γ‐Aminoalkyl Butenolide and Aldehyde Precursors.
Authors: Aurrecoechea Jose M. , Suero Ruben , de Torres Esther 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis of 8,9‐Dialkoxybenzodiazepines and 7,8‐Dialkoxyisoquinolines.
Authors: Pongo Laszlo , Agai Bela , Faigl Ferenc , Reiter Jozsef , Simig Gyula 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Cascade Approach to Substituted 6‐Aryl‐phenanthridines from Aromatic Aldehydes, Anilines, and Benzenediazonium‐2‐carboxylate.
Authors: Shou Wang‐Ge , Yang Yun‐Yun , Wang Yan‐Guang 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Tandem Michael Addition/Amino‐Nitrile Cyclization from 2‐Formyl‐1,4‐DHP in the Synthesis of Novel Dihydroindolizine‐Based Compounds.
Authors: Marchalin Stefan , Baumlova Barbora , Baran Peter , Oulyadi Hassan , Daich Adam 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Enantioselective Synthesis of 1,4‐Dihydrobenzoxathiins via Sulfoxide‐Directed Borane Reduction.
Authors: Waters Marjorie S. , Onofiok Ekama , Tellers David M. , Chilenski Jennifer R. , Song Zhiguo Jake 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Efficient N‐Arylation and N‐Alkenylation of the Five DNA/RNA Nucleobases.
Authors: Jacobsen Mikkel F. , Knudsen Martin M. , Gothelf Kurt V. 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Organoiodine(III)‐Mediated Efficient Synthesis of New 3,9‐Diaryl‐bis‐1,2,4‐triazolo[4,3‐a][4,3‐c]pyrimidines.
Authors: Prakash Om , Kumar Rajesh , Sharma Deepak , Naithani Rajesh , Kumar Ravi 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis and Antiviral and Antitumor Activities of 2H‐[1,2,3]Triazolo[4,5‐d]pyrimidines and 1H‐, 2H‐, and 3H‐[1,2,3]Triazolo[4,5‐d]pyrimidin‐5(4H)‐one‐7(6H)‐thiones.
Authors: Islam Rafiqul , Nagamatsu Tomohisa 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
A Novel Synthesis and Herbicidal Activity of Fluorine‐Containing Pyrazolo[3,4‐d]pyrimidin‐4‐one Derivatives.
Authors: Liu Hui , Wang Hong‐Qing , Ding Ming‐Wu , Liu Zhao‐Jie , Xiao Wen‐Jing 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Microwave‐Assisted Synthesis of 1,3‐Dihydro‐[1,2,5]thiadiazolo[3,4‐b]pyrazine‐2,2‐dioxides.
Authors: Sevilla Sara , Forns Pilar , Fernandez Joan‐Carles , de la Figuera Natalia , Eastwood Paul , Albericio Fernando 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis of New 1,2‐Diphenyl‐4,5‐dihydro‐3H‐3‐benzazepines.
Authors: Kaito Chiaki , Sakamoto Kumiko , Sakamoto Mitsushi , Yamauchi Aiko , Kihara Masaru 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis of 1,2,4‐Trioxepanes and 1,2,4‐Trioxocanes via Photooxygenation of Homoallylic Alcohols.
Authors: Singh Chandan , Pandey Shilpi , Saxena Gunjan , Srivastava Nisha , Sharma Malvika 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Novel Oxybispyridylboronic Acids: Synthesis and Study of Their Reactivity in Suzuki‐Type Cross‐Coupling Reactions.
Authors: Voisin Anne Sophie , Bouillon Alexandre , Berenguer Inmaculada , Lancelot Jean‐Charles , Lesnard Aurelien , Rault Sylvain 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Total Synthesis of Cyclic Diterpene Tonantzitlolone Based on a Highly Stereoselective Substrate‐Controlled Aldol Reaction and Ring‐Closing Metathesis.
Authors: Jasper Christian , Adibekian Alexander , Busch Torsten , Quitschalle Monika , Wittenberg Ruediger , Kirschning Andreas 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Further Guaianolides from Amphoricarpos neumayeri ssp. murbeckii from Montenegro.
Authors: Djordjevic Iris , Jadranin Milka , Vajs Vlatka , Menkovic Nebojsa , Tesevic Vele , Macura Slobodan , Milosavljevic Slobodan 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
C‐24 Stereochemistry of Marine Sterols: (22E)‐24‐(Isopropenyl)‐22‐dehydrocholesterol and 24‐Isopropenylcholesterol.
Authors: Echigo Shizue , Hara Noriyuki , Carderon Gladys Jeanette , Duque Carmenza , Fujimoto Yoshinori 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis of Pipecolic Acid and Baikiain.
Authors: Chang Meng‐Yang , Kung Yung‐Hua , Wu Tsun‐Cheng 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
A Flow Reactor Process for the Synthesis of Peptide Utilizing Immobilized Reagents, Scavengers and Catch and Release Protocols.
Authors: Baxendale Ian R. , Ley Steven V. , Smith Christopher D. , Tranmer Geoffrey K. 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
A Highly Reactive and Stereoselective β‐Mannopyranosylation System: Mannosyl 4‐Pentenoate/PhSeOTf.
Authors: Baek Ju Yuel , Choi Tae Jin , Jeon Heung Bae , Kim Kwan Soo 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
An Improved Total Synthesis of (+)‐Macroline (I) and Alstonerine (IIa) as well as the Formal Total Synthesis of (‐)‐Talcarpine (III) and (‐)‐Anhydromacrosalhine—methine (IIb).
Authors: Liao Xuebin , Zhou Hao , Yu Jianming , Cook James M. 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Catalytic and Stoichiometric Approaches to the Desymmetrization of Centrosymmetric Piperazines by Enantioselective Acylation: A Total Synthesis of Dragmacidin A.
Authors: Anstiss Mark , Nelson Adam 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Arbophylline, a Novel Heptacyclic Indole with a Cage Skeleton Incorporating an Acetal Moiety.
Authors: Lim Kuan‐Hon , Kam Toh‐Seok 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis of Vinca Alkaloids and Related Compounds. Part 106. An Efficient Convergent Synthetic Pathway to Build up the Ibophyllidine Skeleton II. Total Synthesis of (.+‐.)‐Deethylibophyllidine and (.+‐.)‐14‐epi‐Deethylibophyllidine.
Authors: Toth Florian , Kalaus Gyoergy , Greiner Istvan , Kajtar‐Peredy Maria , Goemoery Agnes , Hazai Laszlo , Szantay Csaba 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis and DNA Topoisomerase‐II Inhibitory Activity of Unnatural Nucleosides.
Authors: Mishra Ram Chandra , Dwivedi Namrata , Tripathi Rama Pati , Bansal Iti , Saxena Jitendra Kumar 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Guanosine Analogue in the Pyrido[2,3‐d]pyrimidine Ring System as a Potential Toll‐Like Receptor Agonist.
Authors: Jin Guangyi , Wu Christina C. N. , Carson Dennis A. , Cottam Howard B. 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Cytostatic and Antiviral 6‐Arylpurine Ribonucleosides. Part 8. Synthesis and Evaluation of 6‐Substituted Purine 3′‐Deoxyribonucleosides.
Authors: Hocek Michal , Silhar Peter , Pohl Radek 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Isolation and Identification of Anthraquinones of Caloplaca cerina and Cassia tora.
Authors: Manojlovic I. , Bogdanovic‐Dusanovic G. , Gritsanapan W. , Manojlovic N. 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Paecilaminol, a New NADH‐Fumarate Reductase Inhibitor, Produced by Paecilomyces sp. FKI‐0550
Authors: Shiomi Kazuro , et al. et al. 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
A Practical Method for Phosphorylation of Combretastatin A‐4 with Phosphorus Oxychloride.
Authors: Gill Gurmit S. , Grobelny Damian , Flynn Bernard 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
The Influence of Heat Treatment Regime on the Microstructure and Magnetic Properties of Melt‐spun Nd—Fe—B with Nd Low Content
Authors: Talijan N. , Stajic‐Trosic J. , Grujic A. , Cosovic V. , Nedeljkovic D. , Aleksic R. 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Substituted Cyclobutenes, Their Preparation, and Their Versatility in Synthesis
Authors: Gauvry Noelle , Lescop Cyrille , Huet Francois 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Approaches to Crystallization from Ionic Liquids: Complex Solvents—Complex Results, or, a Strategy for Controlled Formation of New Supramolecular Architectures?
Authors: Reichert W. Matthew , Holbrey John D. , Vigour Kate B. , Morgan Tonya D. , Broker Grant A. , Rogers Robin D. 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis and Biological Activity of Akt/PI3K Inhibitors
Authors: Redaelli C. , Granucci F. , De Gioia L. , Cipolla L. 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Natural Cyclic α,β‐Enone Monoterpenoids in Nucleophilic Addition Reactions
Authors: Ishmuratov G. Yu. , Kharisov R. Ya. , Latypova E. R. , Talipov R. F. 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
From α‐Cedrene to Crinipellin B and Onward: 25 Years of the Alkene—Arene meta‐Photocycloaddition Reaction in Natural Product Synthesis
Authors: Chappell David , Russell Andrew T. 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Derivatization in Mass Spectrometry. Part 8. Soft Ionization Mass Spectrometry of Small Molecules
Authors: Zaikin Vladimir G. , Halket John M. 
Published: March 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Diminished climbing fiber innervation of Purkinje cells in the cerebellum of myosin Va mutant mice and rats
Authors: Takagishi Yoshiko , Hashimoto Kouichi , Kayahara Tetsuro , Watanabe Masahiko , Otsuka Hiroyuki , Mizoguchi Akira , Kano Masanobu , Murata Yoshiharu 
Published: March 2007

AbstractMyosin Va is an actin‐based molecular motor that is involved in organelle transport and membrane trafficking. Here, we explored the role of myosin Va in the formation of synaptic circuitry by examining climbing fiber (CF) innervation of Purkinje cells (PCs) in the cerebella of dilute‐neurological (d‐n) mice and dilute‐opisthotonus (dop) rats that have mutations in dilute‐encoded myosin Va. Anterograde labeling of CFs with biotinylated dextran amine (BDA) revealed that they arborized poorly and that their tips extended only half way through the thickness of the molecular layer (ML) in adult d‐n mice. Using immunohistochemistry specific for vesicular glutamate transporter 2 (VGluT2) to visualize CF synaptic terminals, we found that during development and in adulthood, these terminals did not ascend as far along the proximal shaft dendrites of PCs in d‐n mice and dop rats as they did in normal animals. An irregular distribution of BDA‐labeled bulbous varicosities and VGluT2 spots along CF branches were also noted in these animals. Finally, VGluT2‐positive CF terminals were occasionally localized on the PC somata of adult d‐n cerebella. These phenotypes are consistent with our electrophysiological findings that CF‐mediated excitatory postsynaptic currents (EPSCs) were significantly smaller in amplitude and faster in decay in adult d‐n mice, and that the regression of multiple CFs was slightly delayed in developing d‐n mice. Taken together, our results suggest that myosin Va is essential for terminal CF extension and for the establishment of CF synapses within the proper dendritic territories of PCs. © 2007 Wiley Periodicals, Inc. Develop Neurobiol, 2007.
Normal T splenocytes are able to induce immunoglobulin allotypic suppression in F1 hybrid mice
Authors: Benaroch Philippe , Bordenave Guy 
Published: March 2007

AbstractA chronic suppression of Igh‐1b and Igh‐3b (IgG2a and IgG2b of b haplotype) allotype expression has been induced by injecting T splenocytes from normal BALB/c or BC8 mice into newborn F1 hybrids of appropriate Igh congenic strains: BALB/c into (BALB/c Igha × CB20 Ighb)F1 and BC8 into (BC8 Igha × C57BL/6 Ighb)F1 or (C57BL/6 × BC8)F1. This suppression does not affect IgM (Igh‐6b) or IgA (Igh‐2b) expression. When the Ighb haplotype is paternally transmitted, the proportion of T splenocyte recipients showing allotypic suppression increases with time reaching 70% 40 weeks after birth. We also succeeded in inducing this pattern of suppression in 2 out of 13 cases when the Ighb was inherited from the mother. These normal T splenocytes are therefore clearly allotype specific. As Igh‐6b production is not affected by the suppression, these T splenocytes are believed to influence B cells more or less committed to Igh‐1b or Igh‐3b production rather than more precocious Igh‐6b (IgM of b haplotype) carrying precursors in the classical IgM‐IgG filiation pathway.