Barretto O C, Beutler E
Rev Bras Pesqui Med Biol. 1978 Jun;11(2-3):127-9.
Vertical starch gel electrophoresis of hypoxanthine-guanine phosphoribosyl transferase (HGPRT) and adenine phosphoribosyl transferase (APRT) was performed in several population groups including Caucasians, Negroes and Orientals. The red cells of a total of 244 individuals were examined for HGPRT and those of 265 for APRT and no variants were detected.