蛋白质习性又像酸又像碱，因此说它是两性的。
Proteins behave either as acids or bases and are said to be amphoteric.
该计算公式也可应用到蛋白质、氨基酸等两性电解质的线性滴定分析上。
It can also be applied to determine ampholyte such as protein and amino acid.
运用傅立叶变换红外光谱和元素分析对两性共聚物进行了结构与组成的表征；分析了聚合物的热稳定性和抗蛋白质吸附能力。
The zwitterionic copolymers were characterized by FTIR and elemental analysis, while the thermal property and the capability of resistant to nonspecific protein adsorption were studied.
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