chr start stop reference nuc variant nuc depth genic status zygosity variant ID 12 19172519 19172520 G C 25 GENIC homozygous 953187712 12 19172520 19172521 G T 25 GENIC homozygous 953187713 12 19172521 19172522 G T 25 GENIC homozygous 953187714