chr start stop reference nuc variant nuc depth genic status zygosity variant ID 20 3971848 3971849 T C 60 GENIC homozygous 130027205 20 3972415 3972416 A G 58 GENIC homozygous 130027209 20 3972754 3972755 T C 50 GENIC homozygous 130027210