chr start stop reference nuc variant nuc depth genic status zygosity variant ID 20 3817423 3817424 C T 23 GENIC homozygous 109070041 20 3817525 3817526 C T 22 GENIC homozygous 109070043 20 3818721 3818722 G A 13 GENIC homozygous 109070045