Abstract

A Thai patient with methylmalonic acidemia (MMA) and no methylmalonyl-CoA mutase (MCM, EC 5.4.99.2) activity in leukocytes in the presence of deoxyadenosyl cobalamin ( mut 0) was found to be heterozygous for two novel mutations: 1048delT and 1706_1707delGGinsTA (G544X), inherited from her mother and father, respectively. The proband was also heterozygous for the polymorphism, A499T, which did not affect the activity of recombinant MCM.

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