chr start stop reference nuc variant nuc depth genic status zygosity variant ID 1 220866561 220866562 C T 27 GENIC homozygous 108543236 1 220867114 220867115 T C 23 GENIC homozygous 108543238 1 220867178 220867179 T C 25 GENIC homozygous 108543240