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A protocol has been worked out for separating all thirteen different polypeptides in the beef heart cytochrome c oxidase complex from a single aliquot of enzyme. This involves an initial separation of polypeptides by gel filtration on a Biogel P-60 column in SDS, a step which purifies subunits CIV and CVIII and gives mixtures of CV + CVI, ASA, AED and STA, as well as CVII, CIX and IHQ. These mixtures are then resolved by reverse-phase high-performance liquid chromatography. The separation procedures have been applied to fetal heart cytochrome c oxidase of gestation between 100 and 200 days. No differences were found in the N-terminal sequences of any of the cytoplasmically made subunits or in the entire sequence of CIX between late fetal and adult forms of the enzyme.
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M A Lindorfer, and
R A Capaldi
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S Takamiya, and
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S Takamiya, and
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S Takamiya, and
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S Takamiya, and
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S Takamiya, and
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