Occurrence of arginine deiminase pathway enzymes in arginine catabolism by wine lactic acid bacteria
Article Abstract:
Investigation of the correlation between the occurrence of three arginine deiminase pathway enzymes and arginine catabolism by wine lactic acid bacteria reveals the significant correlation of the occurrence of arginine deiminase pathways enzymes with ammonia formation, arginine degradation and formation of citrulline. Absence of urea during the degradation of arginine indicates the absence of arginase-catalyzed reaction in the arginine catabolism. The ability of wine lactic acid bacteria to degrade arginine is detected by a simple procedure involving the detection of ammonia with Nessler's reagent.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1995
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Arginine deiminase system and acid adaptation of oral streptococci
Article Abstract:
The phenotypic adaptation of strains of plaque streptococci, Streptococcus rattus and S. sanguis, to low pHs is independent of the arginine deiminase system (ADS). The adaptation enhances the bacterial capacity to survive in plaque acidified conditions. Protection against acid damage due to arginolysis is in addition to acid-adaptive response. Desirable organisms with low inherent acid tolerance can adapt phenotypically to acidification and survive better than acid-tolerant organisms.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1995
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Influence of reduced water activity on lactose metabolism by Lactococcus lactis subsp. cremoris at different pH values
Article Abstract:
A study was conducted to characterize the effects of low water activity values on lactose metabolism by both growing and nongrowing cells of Lactococcus lactis subsp. cremoris. Lactococcal strain 2254 and 2272 cultures were prepared at 30 degrees C while samples from buffer preparations and broth cultures were prepared in an Eppendorf centrifuge. Results suggested that polysaccharide may influence the adhesion of starter bacteria and minimize the expulsion of bacterial cells.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1998
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