chr start stop reference nuc variant nuc depth genic status zygosity variant ID 2 186630691 186630692 C T 30 GENIC homozygous 954390387 2 186631191 186631192 T C 24 GENIC heterozygous 954390388 2 186631196 186631197 T C 25 GENIC heterozygous 954390389