A sample of 300 sera from unrelated individuals from Northern Japan was examined by isoelectric focusing on polyacrylamide gels. Three common types, α2HS 1-l, 2-1, and 2-2 were differentiated. The frequencies of the α2HS alleles in our sample were found to be:α2HS1=0.7250 and α2HS2= 0.2750. Analysis of 16 parents with 21 children did not show deviations from the expected mode of inheritance.
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