منابع مشابه
Factors affecting the rate of growth of Lactobacillus casei.
It has been recognized for some time that Lactobacillus casei develops slowly in completely synthetic or semisynthetic media which contain all of the absolutely essential vitamins and amino acids. Usually little or no growth appears during the first 16 to 24 hours of incubation. Under some conditions the addition of asparagine, glutamine, glutamic acid (l), or an unknown factor or factors in pe...
متن کاملCalcium as a growth stimulant for Lactobacillus casei.
Extensive information has been accumulated concerning the organic nutrient requirements of lactic acid bacteria. Studies of the inorganic requirements of these organisms have been pursued less vigorously. Several investigations (Woolley, 1941; McLeod and Snell, 1947; Rogosa, 1944) have been undertaken to determine the essentiality of Mn++, Mg++, K+, Fe++, and PO-for Lactobacillus caswi, strain ...
متن کاملProteolysis by Lactobacillus casei
A study of the proteinase activity of Lactobacillus casei grown in milk and of cell-free extract of L. cawi has been reported on in a previous paper (Brandsaeter and Nelson, 1956). Whereas the proteinases of L. casei have been studied to some extent earlier, very little has been done to characterize the peptidases of this organism. Other lactobacilli hydrolyze some peptides (Christophersen and ...
متن کاملLactobacillus casei dihydrofolate reductase
1 The binding of a series of amide derivatives of methotrexate to Lactobacillus casei dihydrofolate reductase has been studied by inhibition constant measurements and by 'H n.m.r. spectroscopy. 2 Amide modification of the a-carboxylate of methotrexate was found to prevent interaction of the y-carboxylate with the imidazole of His 28. 3 Estimates of the contributions to the binding energy from t...
متن کاملCell surface characteristics of Lactobacillus casei subsp. casei, Lactobacillus paracasei subsp. paracasei, and Lactobacillus rhamnosus strains.
Hydrophilic and electrostatic cell surface properties of eight Lactobacillus strains were characterized by using the microbial adhesion to solvents method and microelectrophoresis, respectively. All strains appeared relatively hydrophilic. The strong microbial adhesion to chloroform, an acidic solvent, in comparison with microbial adhesion to hexadecane, an apolar n-alkane, demonstrated the par...
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ژورنال
عنوان ژورنال: Biochemical Journal
سال: 1948
ISSN: 0306-3283
DOI: 10.1042/bj0430567