A chicken genomic DNA fragment that hybridizes to the murine Hox-3.1 homeobox is likely to encode the NADH ubiquinone oxidoreductase subunit B15

A chicken DNA fragment, which was isolated from a cosmid genomic library using a murine homeobox probe, is shown here to be a likely candidate for encoding a protein homologous to the bovine B 15 subunit of NADH ubiquinone oxidoreductase. The genomic sequence suggests the presence of an intron separating two coding regions. An alignment between the bovine NADH B 15 protein and its putative avian homolog implies the presence of conserved domains, including a transmembrane helix, tyrosine sulfatation site, and a phosphorylation consensus site.