Reaction catalyzed by phospholipase A1 (3.1.1.32)
+
H2O
=
+
1,2-dioctadecenoylthio-sn-glycero-3-phosphocholine
+
H2O
=
1-thio-2-octadecenoylthio-sn-glycero-3-phosphocholine
+
octadecenoate