chr start stop reference nuc variant nuc depth genic status zygosity variant ID 4 117659145 117659146 C T 31 GENIC homozygous 112819900 4 117660176 117660177 C T 29 GENIC homozygous 112819902 4 117662928 117662929 G A 21 GENIC homozygous 112819904