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The Plant Mitochondrial Open Reading Frame Orf221 Encodes a Membrane-bound Protein

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Journal Plant Mol Biol
Date 1993 Oct 1
PMID 8219065
Citations 6
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Abstract

We have shown that the open reading frame orf221 is an active mitochondrial gene which encodes a novel mitochondrial polypeptide. The orf221 sequence is common to higher plants but absent in animal and fungal mitochondria. A mitochondrial polypeptide with an apparent molecular weight of 21,000 was detected with a polyclonal antibody raised against an ORF221 fusion protein. In organello translation followed by immunoprecipitation with the anti-ORF221 antibody demonstrated that this polypeptide is encoded by the orf221 gene in plant mitochondria. The ORF221 was found to be a mitochondrial membrane protein in normal (N), cms-T, and cms-C cytoplasms of several inbred lines of maize (Zea mays L.) and in other plant species.

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