Mitsui Toatsu Chemicals, Incorporated

Mitsui Chemicals, Inc.

Masao Shimada

Daisuke Mochizuki

Tadashi Suzuki

Shin-ichirou Tawaki

Kenji Soda

Junko Tokuda

Yoshiyuki Asai

Kenichi Soshiwata

Junko Tokudo

Akira Hatamori

A novel phytase is disclosed. The phytase consists essentially of a single type of subunits, and can hydrolyze a phytate to myo-inositol. A gene encoding the phytase, which is originated from Schwanniomyces occidentalis is also disclosed.

Phytase

A culture liquid of microorganisms having an ability of producing .alpha.-hydroxyisobutylamide from acetone cyanhydrin or the cultivated cells of the microorganisms or the processed cells of them is/are reacted to acetone cyanhydrin in an aqueous medium to produce .alpha.-hydroxyisobutylamide. The amide is reacted with water and/or an aliphatic alcohol in the presence of a solid acid catalyst at a temperature of 150.degree. C. or higher in a gaseous phase or a gaseous-liquid mixed phase to produce an .alpha.,.beta.-unsaturated carboxylate or an aliphatic alcohol or an .alpha.,.beta.-unsaturated carboxylic acid.

Method of producing .alpha.-hydroxyisobutyramide from acetone

A process for the preparation of L-tryptophan comprises reacting indole with serine in the presence of tryptophan synthetase or tryptophanase, wherein DL-serine or D-serine is used and a serine racemizing enzyme is included in the reaction system and reacted with the serine.

Process for preparation of L-tryptophan by enzyme

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Yamato, Japan

Masao Shimada