chr start stop reference nuc variant nuc depth genic status zygosity variant ID 12 19172519 19172520 G C 22 GENIC homozygous 961921070 12 19172520 19172521 G T 22 GENIC homozygous 961921071 12 19172521 19172522 G T 22 GENIC homozygous 961921072