PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 11754592-0 2002 Methanocarba modification of uracil and adenine nucleotides: high potency of Northern ring conformation at P2Y1, P2Y2, P2Y4, and P2Y11 but not P2Y6 receptors. Uracil 29-35 pyrimidinergic receptor P2Y4 Homo sapiens 119-123 17125260-5 2006 All modifications at the uracil base of UTP led to a decrease in potency at the P2Y4 receptor. Uracil 25-31 pyrimidinergic receptor P2Y4 Homo sapiens 80-84