chr start stop reference nuc variant nuc depth genic status zygosity variant ID 1 163280316 163280317 A G 18 GENIC homozygous 74589999 1 163280347 163280348 T A 23 GENIC homozygous 74590000 1 163281395 163281396 T C 24 GENIC homozygous 74590002