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DNA Marker Index information for Chromosome: M Marker: B4a1a1a1aNames and Aliases for this DNA Marker: B4a1a1a1a.Chromosome Position in hg38 Human Genome assembly1: 373.Chromosome Position in hg19 assembly2: 373 .Ancestral marker allele value: A.Derived, alternative, or mutated marker allele value: G.