PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 7856064-8 1994 In response to activation with phorbol myristic acetate, CD4, but not CD8, was down regulated on the dual expressing T-cells. phorbol myristic acetate 31-55 CD4 molecule Homo sapiens 57-60