The assembly of mitochondrial NADH: ubiquinone oxidoreductase (complex I) was studied in the E35 stopper mutant of Neurospora crassa at different times during growth in liquid media. Assembly of complex I as well as of its membrane domain is impaired in this strain throughout the growth period. Nevertheless, a structure that resembles the peripheral aim of the enzyme is still formed in the mitochondria of this mutant. The absence of the membrane domain of complex I in E35 can be attributed to the specific deletion of the mitochondrial ND2 and ND3 subunits of the enzyme.
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Alves et al. (1998) studied this question.
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