35 嘌呤核苷酸(purine nucleotides)之分解過程中,何種酵素之先天性缺陷會造成 dATP 貯積,傷害免疫細胞, 引起嚴重之免疫缺乏症(immunodeficiency)?(A) adenine phosphoribsyl transferase(C) adenosine deaminase(B) xanthine oxidase(D) purine nucleoside phosphorylase