PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 24065879-1 2013 It is clear from studies using progesterone receptor (PGR) mutant mice that not all of the actions of progesterone (P4) are mediated by this receptor. Progesterone 31-43 progesterone receptor Mus musculus 54-57