chr start stop reference nuc variant nuc depth genic status zygosity variant ID 12 19172519 19172520 G C 44 GENIC homozygous 980054431 12 19172520 19172521 G T 44 GENIC homozygous 980054432 12 19172521 19172522 G T 45 GENIC homozygous 980054433