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- W2063321485 abstract "The septal membranes of the median and lateral giant axons of earthworm, which contain gap junctions, were exposed by cutting one segment of the cord. Patch recordings were obtained from the exposed cytoplasmic side of the septum. Seal resistances ranged from 2 to 15 G omega. The patch could be excised (detached) or left attached to the whole cell. Two types of channels were observed. One type was blocked by tetraethylammonium (TEA) or Cs+ and had a unitary conductance of 30-40 pS. It appears to be a K+ channel. The other channel type had a unitary conductance of 90-110 pS and was unaffected by TEA+ or Cs+. In the detached configuration the channel was shown to conduct Cs+, K+, Na+, TMA+, Cl- and TEA+ even in the presence of 2 mM Zn2+, 1 mM Ni2+, 1 mM Co2+, and 4 mM 4-aminopyridine. The conductance ratios relative to K+ were 1.0 for Cs+, 0.84 for Na+, 0.64 for TMA+, 0.52 for Cl- and 0.2 for TEA+. The channel appears to be voltage insensitive whether monitored in detached or attached recording mode. Both H+ and Ca2+ reduce the probability of opening. Thus, the 100 pS channel has many of the properties expected of a gap junction channel." @default.
- W2063321485 created "2016-06-24" @default.
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- W2063321485 date "1989-09-01" @default.
- W2063321485 modified "2023-09-30" @default.
- W2063321485 title "Patch clamp recordings from membranes which contain gap junction channels" @default.
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- W2063321485 doi "https://doi.org/10.1016/s0006-3495(89)82705-5" @default.
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