we have used the penicillin selection method of autissier & kepes [ ( 1972 ) biochimie 54 , 93 -- 101 ] to study the segregation of membrane-bound respiratory nitrate reductase ( ec 1.9.6.1 ) in escherichia coli for the three generations after cessation of nitrate reductase synthesis caused by withdrawal of nitrate from the growth medium .
C0068800
respiratory
C0028123
nitrate reductase