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Summary of the frequency of mutant alleles in 227 North Americans with galactosemia (each patient has two alleles)

Summary of the frequency of mutant alleles in 227 North Americans with galactosemia (each patient has two alleles)

Mutant alleles	White American	Hispanic American	African American
Q188R	257 (64%)	24 (50%)	22 (21%)
S135L	6 (1.5%)	-	49 (47%)
N314D	4 (1%)	-	-
Other	135 (33.5%)	24 (50%)	33 (32%)
Total alleles	402	48	104

While certain alleles are common, a significant portion are rare or unidentified.

Reproduced with permission from: Wong LJ, Xu YK, Wang BT, et al. Am J Hum Genet 1996; 59:A296. Copyright © 1996 The University of Chicago Press.

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