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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 .

为了达到最优化的稳定，溶液的ph值应该接近，但不要太接近于使蛋白质不带电荷的“等电位点”。