DNA Marker Index information for Chromosome: M Marker: C3990TNames and Aliases for this DNA Marker: C3990T, C3990, i3002124, rs878853005.Chromosome Position in hg38 Human Genome assembly1: 3990.Chromosome Position in hg19 assembly2: 3990 .Ancestral marker allele value: C.Derived, alternative, or mutated marker allele value: T.