{"title":"Rb+、Cs+和T1+对革兰西菌素a诱导骨骼肌细胞膜电导变化的影响。","authors":"G Caffier, N E Shvinka","doi":"","DOIUrl":null,"url":null,"abstract":"<p><p>The channel-forming antibiotic gramicidin A increases the K+ conductance of frog skeletal muscle fibres in isotonic K2SO4 solution. The conductance of the gramicidin channel is not affected by Rb+ or Cs+, but is reduced by T1+. In contrast, the conductance of the normal K+ channel is decreased by Rb+ and Cs+ but is nearly unaffected by 5 and 10 mM T1+. The results suggest differences in the cation permeation through the gramicidin and the K+ channel of the muscle cell membrane.</p>","PeriodicalId":6985,"journal":{"name":"Acta biologica et medica Germanica","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1982-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The effect of Rb+, Cs+, and T1+ on the gramicidin A-induced conductance changes of the skeletal muscle cell membrane.\",\"authors\":\"G Caffier, N E Shvinka\",\"doi\":\"\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>The channel-forming antibiotic gramicidin A increases the K+ conductance of frog skeletal muscle fibres in isotonic K2SO4 solution. The conductance of the gramicidin channel is not affected by Rb+ or Cs+, but is reduced by T1+. In contrast, the conductance of the normal K+ channel is decreased by Rb+ and Cs+ but is nearly unaffected by 5 and 10 mM T1+. The results suggest differences in the cation permeation through the gramicidin and the K+ channel of the muscle cell membrane.</p>\",\"PeriodicalId\":6985,\"journal\":{\"name\":\"Acta biologica et medica Germanica\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1982-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Acta biologica et medica Germanica\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta biologica et medica Germanica","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
在等渗K2SO4溶液中，形成通道的抗生素革兰霉素A增加了青蛙骨骼肌纤维的K+电导。gramicidin通道的电导不受Rb+或Cs+的影响，但受T1+的影响而降低。相比之下，正常K+通道的电导被Rb+和Cs+降低，但几乎不受5和10 mM T1+的影响。结果表明，通过革兰霉素通道和肌细胞膜的K+通道的阳离子渗透存在差异。
The effect of Rb+, Cs+, and T1+ on the gramicidin A-induced conductance changes of the skeletal muscle cell membrane.
The channel-forming antibiotic gramicidin A increases the K+ conductance of frog skeletal muscle fibres in isotonic K2SO4 solution. The conductance of the gramicidin channel is not affected by Rb+ or Cs+, but is reduced by T1+. In contrast, the conductance of the normal K+ channel is decreased by Rb+ and Cs+ but is nearly unaffected by 5 and 10 mM T1+. The results suggest differences in the cation permeation through the gramicidin and the K+ channel of the muscle cell membrane.
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