chr start stop reference nuc variant nuc depth genic status zygosity variant ID 12 19172519 19172520 G C 28 GENIC homozygous 947851687 12 19172520 19172521 G T 29 GENIC homozygous 947851688 12 19172521 19172522 G T 29 GENIC homozygous 947851689