Cell filamentation in an Escherichia coli K-12 fic mutant caused by theophylline or an adenylate cyclase gene (cya)-containing plasmid: FEMS microbiology letters 34 (1986) 117–120 Makoto Kawamukai,Kanehisa Murao,Ryutaro Utsumi,Michio Himeno and Tohru Komano |