PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 1639779-2 1992 Comparison of kcat and Km values measured employing quinonoid 6,7-dimethyldihydropteridine (q-PtH2) as substrate indicate that the native enzyme has a considerable preference for NADH with an optimum kcat/Km of 12 microM-1 s-1 compared with a figure of 0.25 microM-1 s-1 for NADPH. quinonoid 52-61 parathyroid hormone 2 Rattus norvegicus 94-98