| 摘要 |
L-Cysteine and/or L-cystine may be prepared by reacting a beta -substituted L-alanine represented by the general formula (I): <IMAGE> wherein X is a halogen atom, or an -OR or -SR group where R is a hydrogen atom, or an alkyl, acetyl, benzyl or sulfonic acid group, with a metal sulfide, a metal hydrosulfide, a metal polysulfide, ammonium sulfide, ammonium hydrosulfide or an ammonium polysulfide in the presence of tryptophan synthase. |
| 申请人 |
MITSUI TOATSU CHEMICALS, INC., TOKIO/TOKYO, JP |
发明人 |
SHIMADA, MASAO, YAMATO, KANAGAWA, JP;NAKAMURA, TAKESHI, ZUSHI, KANAGAWA, JP;ISHIWATA, KENICHI, YOKOHAMA, KANAGAWA, JP;MAKIGUCHI, NOBUYOSHI, FUJISAWA, KANAGAWA, JP;UEMURA, MASAMI, YOKOHAMA, KANAGAWA, JP |
