PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 10988074-5 2000 While this conformation allows endoperoxide formation between C-11 and C-9, it also implies that a subsequent conformational rearrangement must occur to allow formation of the C-8/C-12 bond and to position C-15 for attack by a second molecule of oxygen. Carbon 62-63 homeobox C8 Homo sapiens 176-179