PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 12226489-6 2002 The enzymatic activity of the purified recombinant AtPLA IVA toward phosphatidylcholine was dependent on Ca(2+), saturated at 0.5 mM, and had a pH optimum of about 7.0. Phosphatidylcholines 68-87 Acyl transferase/acyl hydrolase/lysophospholipase superfamily protein Arabidopsis thaliana 51-60