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- W2058732414 abstract "Culture conditions for the preparation of cells containing high tyrosine phenol lyase activity were studied with Erwinia herbicola ATCC 21434. Adding pyridoxine to the medium enhanced enzyme formation, suggesting that it was utilized as a precursor of the coenzyme, pyridoxal phosphate. Glycerol plus succinic acid; amino acids, such as, DL-methionine, DL-alanine and glycine; and metallic ion, ferrous ion promoted enzyme formation as well as cell growth. Adding L-tyrosine, as inducer, to the culture medium was essential for enzyme formation. However, when large amounts of L-tyrosine were added, the enzyme formation was repressed by the phenol liberated from L-tyrosine. In fact, formation of the enzyme was enhanced by removing phenol during cultivation. L(D)-Phenylalanine or phenylpyruvic acid had a synergistic effect on the induction of enzyme by L-tyrosine. Cells with high enzyme activity were prepared by growing cells at 28°C for 28 hr in a medium containing 0.2% L-tyrosine, 0.2% KH2PO4, 0.1% MgSO4•7H2O, 0.001% FeSO4•7H2O, 0.01% pyridoxine•HCI, 0.6% glycerol, 0.5% succinic acid, 0.1% DL-methionine, 0.2% DL-alanine, 0.05% glycine, 0.1% L-phenylalanine and 120ml/liter hydrolyzed soybean protein in tap water with the pH controlled at 7.5 throughout cultivation." @default.
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- W2058732414 date "1973-01-01" @default.
- W2058732414 modified "2023-09-22" @default.
- W2058732414 title "Culture Conditions for the Preparation of Cells Containing High Tyrosine Phenol Lyase Activity" @default.
- W2058732414 doi "https://doi.org/10.1271/bbb1961.37.485" @default.
- W2058732414 hasPublicationYear "1973" @default.
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