Assignment of Acyl-CoA:cholesterol acyltransferase 1 and 2 (SOAT1, SOAT2) and Diacylglycerol O-acyltransferase 1 (DGAT1) to M. fascicularis chromosome band 1p32, 12q13, 8qter; C. aethiops sabaeus 13q22, 3q12, 1qter; S. sciureus 19q22, 15q21, 16qter by in situ hybridization