PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 11389093-2 2001 PR is expressed as two proteins (PRA and PRB) with different functions, and in vitro evidence reveals PRA to inhibit PRB function, so the cellular ratio of PRA:PRB is likely to be an important determinant of progesterone action. Progesterone 208-220 RB transcriptional corepressor 1 Homo sapiens 117-120 11389093-2 2001 PR is expressed as two proteins (PRA and PRB) with different functions, and in vitro evidence reveals PRA to inhibit PRB function, so the cellular ratio of PRA:PRB is likely to be an important determinant of progesterone action. Progesterone 208-220 RB transcriptional corepressor 1 Homo sapiens 117-120