■　REVIEW

Scale-Up Methodologies for Escherichia coli and Yeast Fermentation Processes.
Beth Helene Junker　

■　GENETICS, MOLECULAR BIOLOGY, AND GENE ENGINEERING

The Promoter of the Yeast OPI1 Regulatory Gene.
Jun-ichi Nikawa and Junko Kamiuto

Host-Dependent Activation of IS1203v Excision in Shiga Toxin-Producing Escherichia coli.
Masahiro Kusumoto, Rieko Suzuki, Yoshiaki Nishiya, Tadayuki Okitsu, and Masanori Oka

An Automated Liquid Handlimg System for Polymerase Chain Reaction Sample Preparation.
Chihiro Uematsu, Ikuko Makino, Takahito Matsunaga, and Kunio Harada　

■　ENZYMOLOGY, PROTEIN ENGINEERING, AND ENZYME TECHNOLOGY

A Novel Enzymatic Approach to the Massproduction of L-Galactose from L-Sorbose.
Khim Leang, Kanako Maekawa, Buetusiwa Thomas Menavuvu, Kenji Morimoto, Tom Birger Granstrom, Goro Takada, and Ken Izumori

Cloning and Expression of a NAD⁺-Dependent Xylitol Dehydrogenase Gene(xdhA) of Aspergillus oryzae.
Lien Ha Tran, Noriyuki Kitamoto, Keiichi Kawai, Kazuhiro Takamizawa, and Tohru Suzuki 　

■　MICROBIAL PHYSIOLOGY AND BIOTECHNOLOGY

Efficient Production of L-(+)-Lactic Acid from Raw Starch by Streptococcus bovis 148.
Junya Narita, Saori Nakahara, Hideki Fukuda, and Akihiko Kondo 　

■　BREWING AND FOOD TECHNOLOGY

Cloning of a Novel Tyrosinase-Encoding Gene (melB) from Aspergillus oryzae and Its Overexpression in Solid-State Culture (Rice Koji).
Hiroshi Obata, Hiroki Ishida, Yoji Hata, Akitsugu Kawato, Yasuhisa Abe, Takeshi Akao, Osamu Akita, and Eiji Ichishima

Isolation and Characterization of Sake Yeast Mutants Deficient in γ-Amino-butyric Acid Utilization in Sake Brewing.
Toshinari Takahashi, Akihisa Furukawa, Shodo Hara, and Haruhiko Mizoguchi 　

■　ENVIRONMENTAL BIOTECHNOLOGY

A Laboratory-Scale Test of Anaerobic Digestion and Methane Production after Phosphorus Recovery from Waste Activated Sludge.
Noboru Takiguchi, Machiko Kishino, Akio Kuroda, Junichi Kato, and Hisao Ohtake

Existence of a Tungsten-Binding Protein in Acidithiobacillus ferrooxidans AP19-3.
Tsuyoshi Sugio, Hiroyuki Kuwano, Yoshiko Hamago, Atsunori Negishi, Terunobu Maeda, Fumiaki Takeuchi, and Kazuo Kamimura

Methane Production from Steam-Exploded Bamboo.
Fumihisa Kobayashi, Harumi Take, Chikako Asada, and Yoshitoshi Nakamura

Characteristics of Rhodococcus pyridinovorans PYJ-1 for the Biodegradition of Benzene, Toluene, m-Xylene (BTX), and Their Mixtures.
In-Gyung Jung and Chang-Ho Park　

■　BIOCHEMICAL ENGINEERING

Efficient Synthesis of Nonnatural Mutants in Escherichia coli S30 in vitro Protein Synthesizing System.
Katsuhiro Yamanaka, Hidetaka Nakata, Takahiro Hohsaka, and Masahiko Sisido 　

■　CELL AND TISSUE ENGINEERING

Application of Cross-Linked Salmon Atelocollagen to the Scaffold of Human Periodontal Ligament Cells.
Nobuhiro Nagai, Shunji Yunoki, Takeshi Suzuki, Maiko Sakata, Kenji Tajima, and Masanobu Munekata 　

■　MEDICAL BIOTECHNOLOGY

Immobilization of Arg-Gly-Asp (RGD) Sequence in a Thermosensitive Hydrogel for Cell Delivery Using Pheochromocytoma Cells (PC12).
Keun-Hong Park and Kyusik Yun　

■　ABSTRACTS OF THE ARTICLES PRINTED IN SEIBUTSU-KOGAKU

KAISHI Vol.82, No.5