PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 15667074-8 2005 PCBs were detectable in sediments deposited well before the time frame when production of PCBs began (before 1930) and were relatively enriched in the less chlorinated homologue groups (3Cl and 4Cl PCBs), suggesting the downward mobility of lightly chlorinated PCB congeners in the sediment column. 3cl and 4cl pcbs 186-202 pyruvate carboxylase Homo sapiens 0-3