a sterol + a 1,2-diacyl-sn-glycero-3-phosphocholine <=> a sterol ester + a 1-acyl-sn-glycero-3-phosphocholine
a sterol + a 1,2-diacyl-sn-glycero-3-phosphocholine <=> a sterol ester + a 1-acyl-sn-glycero-3-phosphocholine