At equilibrium in acidic solution the succinimide derivative, formed by cyclization reaction of the Asp side chain, predominates; at a pH close to the apparent pKa of the Asp residue this reaction is relatively fast with a t1/2 of a few days.
在酸性溶液中处于平衡状态时,由Asp侧链的环化反应形成的琥珀酰亚胺衍生物占主导地位。在接近于Asp残基的表观p K a的pH值下,该反应相对较快,几天的t 1/2。