Apolipoprotein C II, Human Plasma, Very Low Density Lipoprotein Native apolipoprotein C II from human plasma. Found primarily in VLDL and chylomicrons. Functions as a cofactor for lipoprotein lipase. Sigma Aldrich Plasma Lipoproteins, HDL, LDL, VLDL, apolipoproteins, cholesterol, triacylglycerols : composition, structure and biochemistry Lipoprotein Lipase: Structure, Function, and Genetic Variation Metabolic fate of very low density lipoproteins (VLDL) and production of low density lipoproteins (LDL). (A, apolipoprotein A; B 100, apolipoprotein B 100; C, apolipoprotein C; C, cholesterol and cholesteryl ester; E, apolipoprotein E; HDL,