Ajinomoto Co., Ltd.

Shinji Kuroda

Kenzo Yokozeki

Kunihiko Watanabe

Hiroyuki Nozaki

Yoshinobu Takino

Fumie Okura

Yusuke Amino

Keiji Iwasaki

Megumi Kaneko

Shunichi Suzuki

Masakazu Sugiyama

Tatsuki Kashiwagi

Yuki Imabayashi

Cysteine compounds represented by the following formula wherein each symbol is as defined in the specification, and salts thereof, are superior in stability, have less odor, exhibit an eumelanin production suppressive effect, and are useful as cosmetic agents.

Cysteine derivative

Whitening cosmetic

The present invention describes a method for generating a serine derivative and an optically active isomer thereof by a convenient technique, and an enzyme and the like useful in the method. In the presence of the following protein (A) and/or (B) having an enzymatic activity, an &#x3b1;-amino acid is reacted with an aldehyde to form a serine derivative:

Method for producing serine derivative and protein used for the same

The present invention provides a new method for producing serine derivatives and their optically-activated derivatives in a convenient manner. In the presence of an enzyme, an L-&#x3b1;-amino acid of formula (I): (in the formula (I), Ris a hydrocarbon group)is reacted with an aldehyde of formula (II): (in the formula (II), Ris a hydrocarbon)to produce an L-serine derivative of formula (III). .

Method of producing L-serine derivative and enzyme used therefore

A method for producing &#x3b2;-hydroxy amino acid and its optically-active isomer is provided. The &#x3b2;-hydroxy amino acid is produced by reacting a predetermined D-&#x3b1;-amino acid and 5,10-methylene tetrahydrofolic acid in the presence of an enzyme derived from a microorganism belonging to the genera, or

Method for producing &#x3b2;-hydroxy amino acid and enzyme used therefor

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Kawasaki, Japan

Shinji Kuroda