PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 16658236-3 1972 Kinetic studies with 6-methylpurine suggest that the half-life of the messenger RNA for nitrate reductase in both sections is about 20 minutes. 6-methylpurine 21-35 nitrate reductase [NADH] 1 Zea mays 88-105