Effects of chronic exposure to PCBs on cytochrome P450 systems and steroidogenesis in liver and testis of bulls (Bos taurus)

bifenilos policlorados bovin bulls cattle citocromo p450 citocromos cytochrome cytochrome p450 cytochromes cytoplasmic organelles foie ganado bovino liver metabolismo de esteroides metalloproteine metalloproteins microsomes mitochondria mitochondrie mitocondria organite cellulaire organochlorine compounds organulos citoplasmicos polychlorinated biphenyls steroid metabolism taureau testosteronas testosterone toro