A secreted phospholipase A2 subtype that contains a interfacial-binding region with specificity for PHOSPHATIDYLCHOLINE. This enzyme group may play a role in eliciting ARACHIDONIC ACID release from intact cellular membranes and from LOW DENSITY LIPOPROTEINS. Members of this group bind specifically to PHOSPHOLIPASE A2 RECEPTORS.

Synonyms: Group X Secretory Phospholipase A2 EC 3.1.1.4 sPLA(2)-X sPLA2-X GX sPLA(2) Phospholipase A2, Group X Phospholipases A2, Group X Group X Phospholipases A2 Group X Secretory Phospholipase A(2)