chr start stop reference nuc variant nuc depth genic status zygosity variant ID 20 5490868 5490869 A C 17 GENIC homozygous 791978551 20 5490887 5490888 G A 21 GENIC homozygous 791978552 20 5491349 5491350 C G 20 GENIC homozygous 791978553