produced by Aspergillus and Penicillium species and occurs in a wide range of agricultural products. Detoxification of contaminated food is a challenging health issue. In the present paper we report the identification, characterization and crystalstructure (at 2.2 Å) of a novel microbial ochratoxinase from Aspergillus niger. A putative amidase gene encoding a 480 amino acid polypeptide was cloned
phenolic ester mediated peptidesynthesis is an efficient and well established method, the same via totally unsubstituted phenyl ester is not preferred due to the extremely slow rate of aminolysis. We have investigated the scope of the unsubstituted phenyl ester as an intermediate in peptide bond formation and found that it may be useful for the design of chemoselectivepeptideligation when HOBt is used
Amino-acids and peptides. Part XXV. The mechanism of the base-catalysed racemisation of the p-nitrophenyl esters of acylpeptides
作者:I. Antonovics、G. T. Young
DOI:10.1039/j39670000595
日期:——
“direct exchange” mechanism of racemisation and that through the oxazolone, and it is concluded that such racemisation proceeds through the intermediate formation, racemisation, and coupling of the corresponding oxazolone. Evidence is also given that the conversion of benzyloxycarbonylglycyl-L-phenylalanine into its p-nitrophenyl ester by means of diphenyl-keten is accompanied by racemisation.
Associative chemosensing by fluorescent macrocycle–dye complexes – a versatile enzyme assay platform beyond indicator displacement
作者:Frank Biedermann、Denisa Hathazi、Werner M. Nau
DOI:10.1039/c4cc10227d
日期:——
Enzymatic reactions of aromatic substrates can be monitored by fluorescence with μM sensitivity in real time by using self-assembled fluorescent receptors.
芳香底物的酶反应可以通过使用自组装荧光受体实时监测,具有微米级灵敏度的荧光。
METHODS AND SYSTEMS FOR SYNTHESIS OF A D-AMINOLUCIFERIN PRECURSOR AND RELATED COMPOUNDS
申请人:GRYSHUK Amy L.
公开号:US20110224442A1
公开(公告)日:2011-09-15
Methods and systems to generate 6-amino-6-deoxy-
D
-luciferin precursor, 2-cyano-6-aminobenzothiazole and related compounds and derivatives