DNA Marker Index information for Chromosome: Y Marker: L23Names and Aliases for this DNA Marker: L23, PF6534, S141, R1b1a1a2a, rs9785971.Chromosome Position in hg38 Human Genome assembly1: 6885470.Chromosome Position in hg19 assembly2: 6753511 .Ancestral marker allele value: G.Derived, alternative, or mutated marker allele value: A.