Abstract
Electrophoresis of human tears on slab polyacrylamide gels showed five phenotypes among anodal tear proteins. These phenotypes are the expression of autosomal codominant alleles. Gene frequencies are as follows: for Caucasians, At 1=0.99, At 3=0.01; for Negroes, At 1=0.97, At 2=0.03; for Chinese, At 1=0.98, and At 4 and At 5 are both approximately 0.008.