Evaluation of lysine and methionine production in some lactobacilli and yeasts from Ogi

Lysine and methionine producing cultures of Lactobacillus and yeasts in bat ch fermentation of ogi were selected by growth in the presence of the analo gues, S-2-aminoethyl-L-cysteine (thialysine) and ethionine respectively. Th e study shows that 42.5% of the Lactobacillus and 83.3% of the yeast isolat es tested were capable of lysine production while 25.0% of the Lactobacillu s and 87.8% of the yeast isolates produced methionine. The lysine and methi onine yields of Lactobacillus were significantly (P<0.01) higher than that of yeasts. The majority of the yeast isolates excreted most of the lysine a nd methionine produced. More lysine was produced than methionine in all tes ted isolates. (C) 2001 Elsevier Science B.V. All rights reserved.