chr start stop reference nuc variant nuc depth genic status zygosity variant ID 4 134954452 134954453 C T 23 GENIC homozygous 56936281 4 134954632 134954633 C T 24 GENIC homozygous 56936283 4 134954824 134954825 C T 12 GENIC homozygous 56936284