PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 15340914-7 2004 The Tyr side-chains of L32, L92, H100, and H100A form nonpolar contacts with the HEPES ethylene and piperazine groups. ethylene 87-95 ribosomal protein L32 Homo sapiens 23-26