“…CyoB is reported to be one of the subunits of cytochrome o terminal oxidase, and is required for the assembly of the metal centres in the Cyo system (Chepuri et al ., 1990; Fukaya et al ., 1993; Puustinen et al ., 1989). The cytochrome o branch of the respiratory chain is expressed at a low level in cells in the stationary phase, and at a high level in cells growing exponentially (Anraku and Gennis, 1987; Armitage, 1997; Rice and Hempfling, 1978; Sweet and Peterson, 1978; Dinamarca et al ., 2002). In contrast, the cytochrome d ( cio ) terminal oxidase is expressed mainly in the stationary growth phase in Gram‐negative bacteria such as E. coli and P. putida (Bradford, 1976; Nakamura et al ., 1997; Sweet and Peterson, 1978).…”