chr start stop reference nuc variant nuc depth genic status zygosity variant ID 3 20269686 20269687 A T 53 GENIC homozygous 136650768 3 20269760 20269761 C T 59 GENIC homozygous 136650769 3 20269782 20269783 C T 61 GENIC homozygous 136650770