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用不锈钢／电沉积紫膜薄膜／含水胶（电介质）／钢型菌紫质光电池研究了作用于Ｎ－端表面（紫膜外表面）的钾、镁、镧离子对菌紫质光电响应的影响．在所测条件下光电极性均与质子泵方向一致．光电压幅值是离子浓度依赖性的，对钾、镁、镧离子均存在极大值浓度，它们之间有数量级的差异；依赖性曲线趋势和极大值浓度均各自分别与溶液中菌紫质的质子泵效率对阳离子浓度的这种依赖性相一致．不过，光电响应对作用于Ｃ－端表面的这些离子不存在上述的浓度依赖性．上述的两种依赖性成相关性说明：电沉积紫膜薄膜中菌紫质的光电响应主要来自质子泵运而非非质子离子的贡献；存在一合适的离子浓度使菌紫质的光电响应有极大值．用质子泵结构域模型和扩散双电层理论对这种依赖性进行的讨论认为：金属阳离子的结合与屏蔽两种效应可以解释这种依赖性．
The effects of potassium, magnesium and lanthanum ions acting on the N-terminal surface (the outer surface of the purple film) on the photoresponse of bacteriorhodopsin were investigated by using stainless steel / electrodeposited purple film / aqueous gel (dielectrics) / steel fungal purple photocell . In the measured conditions under the photoelectric polarity and proton pump direction. The photo-voltage amplitude is ion concentration-dependent, with maximum concentration of potassium, magnesium and lanthanum ions, with an order of magnitude difference between them. The trend of the dependence curve and the maximum concentration are respectively related to the concentration of purple Proton pump efficiency is consistent with this dependence of cation concentration. However, the optoelectronic response does not exhibit the above concentration dependence on these ions acting on the C-terminal surface. The above two dependencies are correlated: the photoelectric response of the bacteriorhodopsin in the electrodeposited purple film mainly comes from the contribution of proton-pump transport rather than aprotic ions; there is an appropriate ion concentration that allows the optical response of bacteriorhodopsin to maximum. The discussion of this dependence on the proton pump domain model and the diffusion-double-layer theory suggests that the combination of metal cations and shielding can explain this dependence.