chr start stop reference nuc variant nuc depth genic status zygosity variant ID 12 19172519 19172520 G C 16 GENIC homozygous 994741804 12 19172520 19172521 G T 17 GENIC homozygous 994741805 12 19172521 19172522 G T 17 GENIC homozygous 994741806