Results 41 to 50 of about 8,074 (264)
Pteridines, 1989 A series of new amino acid-tetrahydropterin-conjugates has been synthesized starting from N 2-isobutyryl-6,7- dimethyl-5,6,7,8-tetrahydropterin (7). The amino acids have been attached in form of their esters (10 - 16) via a succinyl spacer to the N-5 ...
Lockart Ronan John, Pfleiderer Wolfgang
doaj +1 more source
Pigment Cell &Melanoma Research, Volume 38, Issue 2, March 2025.ABSTRACT Ectothermic vertebrates exhibit a diverse array of pigment cell types—chromatophores—that provide valuable opportunities to uncover mechanisms of fate specification and how they evolve. Like melanocytes of mammals, the melanophores of teleosts and other ectotherms depend on basic helix–loop–helix leucine zipper transcription factors encoded by
Katia G. Korzeniwsky +5 more
wiley +1 more source
Free amino acids in a cave beetle \u3cem\u3eDarlingtonea kentuckensis\u3c/em\u3e Valentine (Coleoptera: Carabidae) [PDF]
, 1974 Free amino acids of Darlingtonea kentuckensis were investigated by two-dimensional, thin-layer chromatography on Silica Gel G. Thirteen amino acids which could be identifìed (alanine, glutamic acid, glycine, histidine, isoleucine and/or leucine, lysine ...
Sperka, R. J.
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Pteridines, 1998 A simple direct method for the synthesis of lumazine-6,7-diamines (9, 25-27) from uracil-5,6-diamines (10-13) and methyl cyanoformimidate (24) was found.
Abou-Hadeed Khaled, Pfleiderer Wolfgang
doaj +1 more source
Pteridines, 1999 A series of new 6-substituted 2,4-diaminopteridines (3-23) and pterins (26-43) have been synthesized by nucleophilic displacement reactions at the side chain of 6-bromomethyl-2,4-diaminopteridine (2) and 6- bromomethylpterin (25) using various types of 0-
Traub Hermann, Pfleiderer Wolfgang
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Pteridines, 2017 Pterins are widely conserved biomolecules that play essential roles in diverse organisms. First described as enzymatic cofactors in eukaryotic systems, bacterial pterins were discovered in cyanobacteria soon after.
Feirer Nathan, Fuqua Clay
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EFSA Journal, Volume 23, Issue 2, February 2025.Abstract Following a request from the European Commission, the Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) of EFSA was asked to deliver a scientific opinion on the safety and efficacy of vitamin B2 98% and vitamin B2 80% in the form of riboflavin produced by fermentation with a genetically modified strain of Bacillus ...
EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) +25 more
wiley +1 more source
First Synthesis of a Representative, Natural Pterin Glycoside: 2’-O-(α-D-Glucopyranosyl)biopterin [PDF]
, 2009 Glycosylation of N(2)-(N,N-dimethylaminomethylene)-1’-O-(4-methoxybenzyl)-3-[2-(4-nitrophenyl) ethyl]biopterin (14) with the novel donor 4,6-di-O-acetyl-2,3-di-O-(4-methoxybenzyl)-α-D-glucopyranosyl bromide (19) in the presence of silver triflate and ...
Hanaya, Tadashi +2 more
core
Pteridines, 2012 Neopterin, as a non-conjugated pteridine, is synthesized from guanosine triphosphate and its production is upregulated upon the activation of cellular immune response.
Girgin Gözde +5 more
doaj +1 more source
Advanced Functional Materials, Volume 35, Issue 2, January 9, 2025.This review elucidates the design of leveraging non‐covalent interactions (NCIs) effect on light‐emitting organic small molecules to achieve highly efficient emission characteristics. Representative organic emitters ranging from ultraviolet to near‐infrared regions are listed and investigated.
Taehyun Kim +3 more
wiley +1 more source