chr start stop reference nuc variant nuc depth genic status zygosity variant ID 2 181897874 181897875 C T 36 GENIC homozygous 974982560 2 181898575 181898576 G C 17 GENIC homozygous 974982561 2 181901979 181901980 C T 27 GENIC homozygous 974982562