146. 當電動機控制盤遷移裝置位置後，則 (A)不必量測電源電壓 (B)不必檢查電源相序 (C)需檢查電源電壓及相序 (D) 不必檢查電動機接線是否正確

1. Protein X becomes more active in an acidic environment. When the surrounding pH decreases, protein X undergoes a conformational change, leading to its activation. Which of the following amino acid residues is most likely responsible for this pH-dependent regulation?(A) Alanine(B) Leucine(C) Histidine(D) Valine(E) Phenylalanine