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The phylogenetic position of aardvark (Orycteropus afer) as suggested by its myoglobin.

Skeletal muscle myoglobin of the aardvark (Orycteropus afer) was isolated and its primary structure determined. The amino-acid sequence was then used in conjunction with previously established myoglobin sequences to evaluate the phylogenetic relationships of the aardvark. The most parsimonious trees constructed from this myoglobin sequence data either alone or when combined with lens alpha-crystallin A sequence data depict the aardvark lineage as one of the most ancient among Eutheria.