PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 21867543-5 2011 Higher CR1 expression on erythrocytes in CC genotype versus CG+GG for both groups was detected, whereas no difference was observed for other cell populations. cysteinylglycine 60-62 complement C3b/C4b receptor 1 (Knops blood group) Homo sapiens 7-10