IDENTIFICATION OF GROWTH STIMULANTS FOR STREPTOCOCCUS LACTIS
نویسندگان
چکیده
منابع مشابه
Proton motive force during growth of Streptococcus lactis cells.
Experiments with the aerotolerant anaerobe Streptococcus lactis provide the opportunity for determining the proton motive force (Deltap) in dividing cells. The two components of Deltap, DeltaPsi (the transmembrane potential) and DeltapH (the chemical gradient of H(+)), were determined by the accumulation of radiolabeled tetraphenylphosphonium (TPP(+)) and benzoate ions. The DeltaPsi was calibra...
متن کاملPyruvate kinase of Streptococcus lactis.
The kinetic properties of pyruvate kinase (ATP:pyruvate-phosphotransferase, EC 2.7.1.40) from Streptococcus lactis have been investigated. Positive homotropic kinetics were observed with phosphoenolpyruvate and adenosine 5'-diphosphate, resulting in a sigmoid relationship between reaction velocity and substrate concentrations. This relationship was abolished with an excess of the heterotropic e...
متن کاملRelation of growth of Streptococcus lactis and Streptococcus cremoris to amino acid transport.
The maximum specific growth rate of Streptococcus lactis and Streptococcus cremoris on synthetic medium containing glutamate but no glutamine decreases rapidly above pH 7. Growth of these organisms is extended to pH values in excess of 8 in the presence of glutamine. These results can be explained by the kinetic properties of glutamate and glutamine transport (B. Poolman, E. J. Smid, and W. N. ...
متن کاملExtracellular Proteinase of Streptococcus Lactis.
Williamson, W. T. (North Carolina State of the University of North Carolina, Raleigh), S. B. Tove, and M. L. Speck. Extracellular proteinase of Streptococcus lactis. J. Bacteriol. 87:49-53. 1964.-Streptococcus lactis was shown to produce an extracellular proteolytic enzyme(s). A 120-fold purification of the proteinase was obtained from the cell-free culture medium by ammonium sulfate fractionat...
متن کاملIdentification of a stimulant for Lactobacillus casei produced by Streptococcus lactis.
A compound stimulatory to the growth of Lactobacillus casei was isolated from cell extracts of Streptococcus lactis, purified, and characterized. The stimulant was identified as a small peptide with a molecular weight of approximately 4,500 daltons. The purified peptide gave negative tests for nucleic acids, phosphorus, glucosamine, and carbohydrates. Sixteen amino acids were detected in acid h...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 1963
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.85.5.1051-1055.1963