| 摘要 |
1,261,363. Acid carboxypeptidase. KIKKOMAN SHOYU CO. Ltd. 15 April, 1969 [9 Dec., 1968], No. 19134/69. Heading C3H. An acid carboxypeptidase reacts hydrolytically with the terminal peptide linkage of a protein or peptide adjacent to the terminal free carboxyl group to liberate the terminal amino acid as free amino acid at a pH of from 1À5 to 5À5, contains no metal, has a molecular weight of about 122,000 and is inactive at 60‹ C. or more or a pH of 7 or more. It may be prepared from Aspergillus usamii, A. saitoi, A. riger, A. inuii, A. aureus, A. awamori, A. nakazawaii, A. oryzae or A. sojae by aerobic culture: the enzyme occurs in the culture medium and can be worked up by conventional methods.
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