Hisao Masai and Ken-ichi Arai.

Department of Molecular and Developmental Biology, Institute of Medical Science, University of Tokyo, 4-6-1, Shirokanedai, Minato-ku, Tokyo, 108, Japan

Received 01/17/96; Accepted 02/17/96; On-line 03/01/96

We thank Dr. Tokio Kogoma of University of New Mexico School of Medicine for collaboration on genetic study of E. coli priA gene as well as for sharing information of unpublished results. We also thank Tsuyoshi Miyake of our department and Albert Zlotnik of DNAX Research Institue for help in data bank search.