Overall the balance of COO- and COOH changes based on the pH of the blood.

COO-和COOH的总体平衡会根据血液的pH值而变化。

This happens because albumin has acidic amino acids, like glutamate and aspartate, which have some carboxyl groups that are in the form of COO- or COOH.

这是因为白蛋白含有酸性氨基酸，比如谷氨酸与天冬氨酸，它们具有一些以COO-或COOH形式存在的羧基。