chr start stop reference nuc variant nuc depth genic status zygosity variant ID 4 81912463 81912464 C T 21 GENIC homozygous 113277073 4 81912809 81912810 C T 25 GENIC homozygous 112749670 4 81913435 81913436 A G 18 GENIC homozygous 112749674