Abstract
The nucleotide sequences of the mitochondrial ND6 and tRNA(Glu) genes and part of the displacement loop region in two closely related seabird species are presented. A chicken type gene organization in which the tRNA(Glu), ND6, and displacement loop are localized next to each other was found in these species and suggests that this is a conserved feature of avian mitochondrial DNA. The nucleotide and amino acid divergences of ND6 at different taxonomic levels are assessed, and its relevance to phylogenetic studies in birds is discussed.
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