... WOMI2.tpgs 5/8/03 6: 01 PM Page Brigham Narins, Editor Vo l u m e M-Z General Index MICROBIOLOGY AND IMMUNOLOGY WORLD of 5/7/03 7: 52 AM Page 359 MACLEOD, COLIN MUNRO (19 0 9 -1 9 72) Canadian-born ... forms, or alleles, of each gene There are at least 57 HLA-A alleles, 11 1 HLA-B alleles, and 34 HLA-C alleles Class II MHC genes include HLA-DP, HLA-DQ, and HLA-DR Class II MHC are particularly important ... married Elizabeth Randol in 19 38; they eventually had one daughter In 19 41, MacLeod became a citizen of the United States, and was appointed professor and chairman of the department of microbiology...