chr start stop reference nuc variant nuc depth genic status zygosity variant ID 4 108493149 108493150 G T 21 GENIC homozygous 112806666 4 108493900 108493901 C G 5 GENIC homozygous 112806668 4 108493904 108493905 C G 5 GENIC homozygous 112806670