Quantification of the amount of 1-(1-enyl-palmitoyl)-2-palmitoleoyl-GPC (P-16:0/16:1) in a sample. The trait is 1-(1-enyl-palmitoyl)-2-palmitoleoyl-GPC (P-16:0/16:1) measurement (Experimental Factor Ontology entry EFO_0800464).