PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 2325409-3 1990 An increase in the concentration of potassium phosphate (from 25 to 250 mM) caused a marked decrease in the catalytic activity of cytochromes P-450a (to 8%), P-450b (to 22%) and P-450h (to 23%), but caused a pronounced increase in the catalytic activity of cytochrome P-450p (up to 4.2-fold). potassium phosphate 36-55 cytochrome P450, subfamily 2, polypeptide 11 Rattus norvegicus 178-184