chr start stop reference nuc variant nuc depth genic status zygosity variant ID 12 19172519 19172520 G C 19 GENIC homozygous 988903855 12 19172520 19172521 G T 18 GENIC homozygous 988903856 12 19172521 19172522 G T 19 GENIC homozygous 988903857