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