PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 16529578-2 2006 The extracellular phospholipase A(2) activity of human spermatozoa was determined by matrix-assisted laser desorption and ionization time-of-flight (MALDI-TOF) mass spectrometry after destabilization of acrosome by the calcium-ionophore calcimycin. Calcimycin 237-247 phospholipase A2 group IB Homo sapiens 18-36