Abstract
Phenotypes positive for G3m(23) but negative for G1m(3) and G3m(5,10,11,13,14) are generally very infrequent in Caucasian populations. We recently Gm typed 372 Australian blood donors, predominantly of European descent, and found to Gm(1;23) and five Gm(1,2;23) individuals among them. This finding suggests that the haplotypes Gm1,17;23;21 and Gm1,2,17;23;21 may occur, in some European populations, with a frequency considerably higher than has been generally assumed.