chr start stop reference nuc variant nuc depth genic status zygosity variant ID 4 137124812 137124813 T C 15 GENIC homozygous 56942956 4 137124929 137124930 T C 15 GENIC homozygous 56942957 4 137125301 137125302 C T 19 GENIC homozygous 56942958