BACKGROUND Butane-2,3-diol (2,3-BD) is a fuel and platform biochemical with various industrial applications. 2,3-BD exists in three stereoisomeric forms: (2R,3R)-2,3-BD, meso-2,3-BD and (2S,3S)-2,3-BD. Microbial fermentative processes have been reported for (2R,3R)-2,3-BD and meso-2,3-BD production. RESULTS The production of (2S,3S)-2,3-BD from glucose was acquired by whole cells of recombina...

Benzo[a]pyrene (B[a]P), a known environmental pollutant and tobacco smoke carcinogen, is metabolically activated to highly tumorigenic B[a]P diol epoxide derivatives that predominantly form N(2)-guanine adducts in cellular DNA. Although nucleotide excision repair (NER) is an important cellular defense mechanism, the molecular basis of recognition of these bulky lesions is poorly understood. In ...

Indolicidin is an antimicrobial peptide showing a broad spectrum of antibacterial and antifungal activities, and according to the cis-trans isomerism of three Xaa-Pro peptide bonds, eight different stereoisomers could be distinguished for this peptide. As the cis-trans isomerism about the Xaa-Pro peptide bonds was not considered in previous studies, the structural features of distinct stereoiso...

A series of ligands containing a 1,4-disubstituted 1,2,3-triazole unit have been used for the formation triple-stranded dinuclear Ru(II) complexes. In contrast to previously reported complexes labile metals, use inert enabled stereoisomeric mixtures diruthenium(II) be accessed. The chromatographic resolution enantiomers helicate more rigid 1,4-xylyl spacer was carried out on cellulose. ligand m...

Previous studies (Lankford et al., 1952) demonstrated that minute quantities of Dor i-methionine (0.001 to 0.01 ug S per ml) exert a stimulatory effect on the utilization of "DL" (inactive)-homocystine by selected strains of Brucella suis. The growth response to D-homocystine was found to be proportional to the quantity of methionine present, either as contamination of the commercial sample, or...

The stereoselectivity of R,S-venlafaxine and its metabolites R,S-O-desmethylvenlafaxine, N-desmethylvenlafaxine, O,N-didesmethylvenlafaxine, N,N-didesmethylvenlafaxine and tridesmethylvenlafaxine was studied in three processes: (i) anaerobic and aerobic laboratory scale tests; (ii) six wastewater treatment plants (WWTPs) operating under different conditions; and (iii) a variety of wastewater tr...