the betaine-stimulated differential synthesis of vitamin b ( 12 ) , i.e. , the increase in b ( 12 ) per increase in dry cell weight , by pseudomonas denitrificans was inhibited by rifampin and chloramphenicol but not by benzylpenicillin and carbenicillin at concentrations of antibiotic that inhibit growth .
C0030827
benzylpenicillin
C0006976
carbenicillin