The nuclear gene for subunit Vc of sweet potato cytochrome c oxidase.

We have cloned the gene for subunit Vc of sweet potato cytochrome c oxidase using its cDNA as a probe. There is a single intron, located one nucleotide upstream of the start of the open reading frame. No typical TATA-box sequence is present in the region upstream of the site of initiation of transcription in the cloned genomic DNA, suggesting that an alternative sequence may function in control of the expression of this gene. The nuclear genome of sweet potato contains only a single species of gene for subunit Vc.