PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 6296363-3 1983 The effect of morphine on plasma cyclic GMP was mimicked by opioid peptides such as (D-Ala2, Met)-enkephalinamide, FK 33,824 or beta-endorphin. Morphine 14-22 pro-opiomelanocortin-alpha Mus musculus 128-142