chr start stop reference nuc variant nuc depth genic status zygosity variant ID 20 17311763 17311764 C T 8 GENIC heterozygous 403681871 20 17311763 17311764 C 8 GENIC heterozygous 403681872 20 17311766 17311767 C T 8 GENIC heterozygous 403681873 20 17311766 17311767 C 8 GENIC heterozygous 403681874