two different antibodies directed against cytochrome p-450 revealed the ontogenic profile of the phenobarbitone-inducible b and e forms , which appeared at an earlier stage of development , day 1 of culture ( equivalent to day 14 of gestation ) , than did the 3-methylcholanthrene-inducible c form , which appeared on day 3 of culture ( equivalent to day 16 of gestation ) .
C0031412
phenobarbitone
C0032961
gestation