PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 21601452-0 2011 Tetrazine-trans-cyclooctene ligation for the rapid construction of integrin alphavbeta3 targeted PET tracer based on a cyclic RGD peptide. 1,2,3,4-tetrazine 0-9 integrin subunit alpha V Homo sapiens 67-87