chr start stop reference nuc variant nuc depth genic status zygosity variant ID 15 55127444 55127447 TTC --- 21 GENIC homozygous 48313765 15 55127448 55127449 G - 22 GENIC homozygous 48313766 15 55127450 55127451 G A 23 GENIC homozygous 48959021