Linked Life Data

2443422

Source:http://linkedlifedata.com/resource/pubmed/id/2443422

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1987-11-19
pubmed:abstractText
Calcium currents in crayfish muscle fibres were studied by means of the vaseline gap voltage clamp technique. Overlapping potassium currents were fully suppressed using fibre fragments equilibrated in K+-free intracellular solution. The design of the recording chamber tailored to crayfish muscle fibres is described in detail. Ca currents recorded has a two-component time course. The transient (ICa, T) component (peaking in about 10 ms) attained, on average, maximal overall density of 26.4 microA/cm2 at depolarization to -4.6 mV from a holding potential of -80 mV. The steady (ICa, S) component attained 16.7 microA/cm2 (evaluated at the end of a 70 ms pulse) at +13.8 mV. The average overall surface area of the clamped membrane surface (including invaginated parts) was about 0.07 cm2. The ICa, S component could be separated from ICa, T using short inactivating prepulses. Voltage and time dependence of the transient component inactivation, as well as its recovery from inactivation, were in agreement with a Ca-dependent mechanism. Independent behaviour of the two Ca current components and differences in their properties support the hypothesis concerning the existence of two populations of Ca channels in the surface membrane of the crayfish muscle.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0231-5882
pubmed:author
pubmed:issnType
Print
pubmed:volume
6
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
113-25
pubmed:dateRevised
2003-11-14
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
Calcium channels in crayfish muscle fibre fragments studied by means of the Vaseline gap technique.
pubmed:affiliation
Centre of Physiological Sciences, Slovak Academy of Sciences. Bratislava, Czechoslovakia.
pubmed:publicationType
Journal Article