chr start stop reference nuc variant nuc depth genic status zygosity variant ID 20 5490868 5490869 A C 16 GENIC homozygous 805445749 20 5490887 5490888 G A 16 GENIC homozygous 805445750 20 5491349 5491350 C G 26 GENIC homozygous 805445751