chr start stop reference nuc variant nuc depth genic status zygosity variant ID 7 143942890 143942891 A C 29 GENIC homozygous 115944797 7 143945583 143945584 A G 57 GENIC homozygous 115944798 7 143946079 143946080 A T 44 GENIC homozygous 115944799