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. 1977 Mar;29(2):164-8.

Detection of heterozygotes for tyrosinase-negative oculocutaneous albinism by hairbulb tyrosinase assay

R A King, C J Witkop

Detection of heterozygotes for tyrosinase-negative oculocutaneous albinism by hairbulb tyrosinase assay

R A King et al. Am J Hum Genet. 1977 Mar.

Abstract

Five heterozygotes for ty-neg OCA had absent or markedly reduced hairbulb tyrosinase activity, when compared to normally pigmented control subjects. Clinically, all five were fully pigmented and could not be distinguished from the normal control subjects. It is proposed that the quantitative hairbulb tyrosinase assay can be used to detect heterozygotes for ty-neg OCA. A mechanism to explain the low levels of activity in the hairbulbs from heterozygotes is discussed.

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