chr start stop reference nuc variant nuc depth genic status zygosity variant ID 12 20876948 20876949 C T 12 GENIC homozygous 50107163 12 20877073 20877074 G A 14 GENIC homozygous 50107165 12 20877297 20877298 G A 22 GENIC homozygous 50107167