The enzyme in Rhodopseudomona@ spheroides requires DPN as a co-factor (13) and has been called threonine dehydrogenase (14). Aminoacetone can also be synthesized by the condensa tion of glycine and acetyl CoA to form a-amino-@-keto butyric acid (6, 10, 21, 22). This reaction is analogous to that involved in the biosynthesis of 5-aminolevulinic acid, the aliphatic precursor of porphyrins, and wa...

This article reports the cloning of the genes encoding the Arabidopsis and rice class III ADH enzymes, members of the alcohol dehydrogenase or medium chain reductase/dehydrogenase superfamily of proteins with glutathione-dependent formaldehyde dehydrogenase activity (GSH-FDH). Both genes contain eight introns in exactly the same positions, and these positions are conserved in plant ethanol-acti...

Aminotransferases and glutamate dehydrogenase are two main types of enzymes involved in the initial steps of amino acid catabolism, which plays a key role in the cheese flavor development. In the present work, glutamate dehydrogenase and aminotransferase activities were screened in twenty one strains of lactic acid bacteria of dairy interest, either cheese-isolated or commercial starters, inclu...