Isoelectric focusing may be used as another indication .
等电聚焦可以用为另一指标。
A virus is negatively charged above its isoelectric point .
病毒在它的等电离点以上时带负电荷。
Objective : to determine the amino acid composition and isoelectric point of porcine platelet-derived growth factor .
摘要目的：测定猪血小板衍生生长因子的氨基酸组成和等电点。
Physicochemical properties , such as solubility , isoelectric point , moisture absorption , intrinsic viscosity , were also studied .
并对产品的理化性质如溶解度、等电点、吸湿性、特性粘度进行了研究。
To achieve optimal stability , the solution ph should be close , but not too close , to the " isoelectric point " at which the proteins are uncharged .
