chr start stop reference nuc variant nuc depth genic status zygosity variant ID 18 17690993 17690994 A G 14 GENIC homozygous 46373208 18 17691032 17691033 A G 14 GENIC homozygous 46373209 18 17691976 17691977 A G 23 GENIC homozygous 46373212