PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 12926963-3 2003 In the first step, Pro-1 acts as a general base to abstract a proton from the third carbon of the substrate, 2-oxo-4-hexenedioate, creating a negative charge on the oxygen at C-2 of this substrate. Carbon 84-90 lamin A/C Homo sapiens 19-24 12926963-4 2003 In the second step, the same hydrogen abstracted by the N-terminal Pro-1 is shuttled back to the fifth carbon of the substrate to form the product, 2-oxo-3-hexenedioate. Carbon 103-109 lamin A/C Homo sapiens 67-72