Affinity chromatography of arterial lysosomal cholesterol ester hydrolase

The glycoproteic nature of rabbit aortic lysosomal cholesterol ester hydrolase has been demonstrated by affinity chromatography on Concanavalin A-Sepharose. After chromatography, the enzyme lacks synthesizing activity. This activity is restored by addition of deactivated lysosomes containing more endogenous cholesterol. On the other hand, a hypothesis for the activation role of bis(monoacylglyceryl) phosphate is suggested.