DNA Marker Index information for Chromosome: M Marker: A493GNames and Aliases for this DNA Marker: A493G, A493, i4001046, rs377569791.Chromosome Position in hg38 Human Genome assembly1: 493.Chromosome Position in hg19 assembly2: 493 .Ancestral marker allele value: A.Derived, alternative, or mutated marker allele value: G.