Results 11 to 20 of about 21,587 (210)
Epimerization of ergot alkaloids in feed [PDF]
Heliyon, 2020 Chronic intake of cereals contaminated with ergot alkaloids can cause ergotism and result in the loss of toes and fingers or even death. Today, due to common risk management practices, ergotism is rare as a human disease but remains a problem in ...
Claude Schummer +3 more
doaj +3 more sources
Peptide Epimerization Machineries Found in Microorganisms [PDF]
Frontiers in Microbiology, 2018 D-Amino acid residues have been identified in peptides from a variety of eukaryotes and prokaryotes. In microorganisms, UDP-N-acetylmuramic acid pentapeptide (UDP-MurNAc-L-Ala-D-Glu-meso-diaminopimelate-D-Ala-D-Ala), a unit of peptidoglycan, is a ...
Yasushi Ogasawara, Tohru Dairi
doaj +3 more sources
Making Blank Faces Expressive: Chemical Approaches to the Modification of Chemically Inert Peptides. [PDF]
J Pept SciAs an alternative to the conventional approach, which combines amino acid monomers in a one‐by‐one fashion to peptide derivatives, the chemical modification of existing peptides has attracted significant attention in recent years. However, such approaches generally target the reactive functional groups in cysteine and lysine residues, particularly in ...
Moriyama Y, Sada H, Nanjo T.
europepmc +2 more sources
Methionine epimerization in cyclic peptides
RSC Advances, 2021 One step regioselective methionine epimerization in cyclic peptides followed by selective functionalization leads to chemical novelty.
Pramodkumar D. Jadhav +5 more
openaire +3 more sources
Photocatalyzed Epimerization of Quaternary Stereocenters. [PDF]
J Am Chem SocQuaternary stereocenters play a crucial role in shaping both the molecular topology of small molecules and the outcome of stereoselective transformations. While considerable progress has been achieved in constructing highly substituted carbon centers with varied substitution patterns, the stereoselective synthesis of quaternary carbon centers remains a
Wu L +6 more
europepmc +3 more sources
Pd-catalyzed enantioselective aerobic oxidation of secondary alcohols: Applications to the total synthesis of alkaloids [PDF]
, 2008 Enantioselective syntheses of the alkaloids (-)-aurantioclavine, (+)-amurensinine, (-)-lobeline, and (-)- and (+)-sedamine are described. The syntheses demonstrate the effectiveness of the Pd-catalyzed asymmetric oxidation of secondary alcohols in ...
Bagdanoff, Jeffrey T. +5 more
core +2 more sources
Inorganics, 2018 The present article reports the application of vibrational circular dichroism (VCD) and temperature-dependent electronic circular dichroism (ECD) methods to reveal the dynamical aspects of a star-burst tetranuclear metal complex with a labile central ...
Hisako Sato +2 more
doaj +1 more source
Scale and structure of time-averaging (age mixing) in terrestrial gastropod assemblages from Quaternary eolian deposits of the eastern Canary Islands [PDF]
, 2007 Quantitative estimates of time-averaging (age mixing) in gastropod shell accumulations from Quaternary (the late Pleistocene and Holocene) eolian deposits of Canary Islands were obtained by direct dating of individual gastropods obtained from ...
Torres Pérez-Hidalgo, Trinidad José
core +2 more sources
Scientific Reports, 2017 Sugar 4-epimerization reactions are important for the production of rare sugars and their derivatives, which have various potential industrial applications.
Seon-Hwa Lee +6 more
doaj +1 more source