Negative charge at amino acid 149 is the molecular determinant for substrate specificity of lecithin: cholesterol acyltransferase for phosphatidylcholine containing 20-carbon sn-2 fatty acyl chains.
Zhao Y, Wang J, Gebre AK, Chisholm JW, Parks JS. Negative charge at amino acid 149 is the molecular determinant for substrate specificity of lecithin: cholesterol acyltransferase for phosphatidylcholine containing 20-carbon sn-2 fatty acyl chains. Biochemistry. 2003 Dec 02; 42(47):13941-9.