PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 19683078-7 2009 Oxygen transfer studies found that 18O from [carboxyl-18O] phosphopantothenate is incorporated into the AMP or CMP produced during PPCS catalysis, consistent with the formation of a phosphopantothenoyl cytidylate or phosphopantothenoyl adenylate intermediate, supporting similar catalytic mechanisms under both CTP and ATP conditions. Cytidine Monophosphate 111-114 phosphopantothenoylcysteine synthetase Homo sapiens 131-135