缬氨霉素对紫膜碎片双层平板脂膜(BLM)光电响应的影响  

THE EFFECT OF VALINOMYCIN ON ELECTRIAL PROPERTIES OF BILAYER LIPID MEMBRANE(BLM)AND PHOTOELECTRIC RESPONSES

作　　者：胡坤生[1] 谈曼琪 石志远[1] 彭程航[1] 

机构地区：[1]中国科学院生物物理研究所,北京100080

出　　处：《生物物理学报》1991年第2期179-182,共4页Acta Biophysica Sinica

基　　金：国家自然科学基金

摘　　要：本实验中测量了缬氨霉素对双层平板膜系统的电性质和紫膜碎片BLM上光电响应的作用.实验结果表明:缬氨霉素对K^+很灵敏,它可使大豆磷脂BLM的膜电阻下降近四个量级,膜的稳定性也下降.它对Na^+也有作用,但其作用不如K^+那么明显.在缬氨霉素作用下,K^+对紫膜碎片BLM光电响应的影响十分明显,它可以使光电压完全消失.Na^+对紫膜碎片BLM的作用则比K^+的作用小得多.The effects of valinomycin on electrical properties of bilayer lipid membrane (BLM) and photoelectric responses of purple membrane fragment were measured. The results indicate that valinomycin is sensitive to K+ and the membrane resistance was significantly decreased. Valinomycin slightly effects the membrane rasist-ance in0.1M NaCL solution. In 0.1M KCL solution, valinomycin effects the photoelectric response of purple membrane fragment, the photovoltage can be disappeared. In 0.1M NaCL solution, the effect of valinomycin on photoelectric response was less than K + .

关 键 词：紫膜 BLM 结页氨霉素 光电响应 

分 类 号：Q734[生物学—分子生物学]