PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 7558664-1 1994 The G0/G1 to S-phase transition in quiescent EL2 rat fibroblast cells stimulated by mitogen (such as the epidermal growth factor) can be blocked by the addition of morphine to the system. Morphine 164-172 epilepsy 2 Mus musculus 45-48