Artigo Revisado por pares

Joint distributions of apparent open and shut times of single-ion channels and maximum likelihood fitting of mechanisms

1996; Royal Society; Volume: 354; Issue: 1718 Linguagem: Inglês

10.1098/rsta.1996.0115

ISSN

1471-2962

Autores

David Colquhoun, Alan G. Hawkes, K. Srodzinski,

Tópico(s)

stochastic dynamics and bifurcation

Resumo

Restricted accessMoreSectionsView PDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareShare onFacebookTwitterLinked InRedditEmail Cite this article Colquhoun David , Hawkes A. G. and Srodzinski K. 1996Joint distributions of apparent open and shut times of single-ion channels and maximum likelihood fitting of mechanismsPhil. Trans. R. Soc. A.3542555–2590http://doi.org/10.1098/rsta.1996.0115SectionRestricted accessArticleJoint distributions of apparent open and shut times of single-ion channels and maximum likelihood fitting of mechanisms David Colquhoun Google Scholar Find this author on PubMed Search for more papers by this author , A. G. Hawkes Google Scholar Find this author on PubMed Search for more papers by this author and K. Srodzinski Google Scholar Find this author on PubMed Search for more papers by this author David Colquhoun Google Scholar Find this author on PubMed , A. G. Hawkes Google Scholar Find this author on PubMed and K. Srodzinski Google Scholar Find this author on PubMed Published:15 November 1996https://doi.org/10.1098/rsta.1996.0115AbstractThe openings and shuttings of individual ion channel molecules can be modelled in terms of an underlying Markov process with discrete states in continuous time. In practice, some of the open times, and/or shut times, are too short to be detected reliably, making the durations of some of these intervals appear to be longer than they really are. Under certain assumptions about how this happens, the probability densities of these apparent times have previously been obtained. It has been shown that the ability to distinguish between alternative postulated reaction mechanisms can be greatly improved by considering bivariate distributions. In this paper we obtain joint distributions, and hence conditional distributions, of adjacent apparent open and shut times. Numerical examples illustrate what insight these conditional distributions may provide about the underlying mechanism. Bivariate distributions are readily generalized to multivariate distributions which enable the likelihood for an entire single-channel recording to be computed, and hence efficient maximum likelihood estimates for the mechanism's rate constants can be obtained. Numerical examples of such fitting are given.FootnotesThis text was harvested from a scanned image of the original document using optical character recognition (OCR) software. As such, it may contain errors. Please contact the Royal Society if you find an error you would like to see corrected. Mathematical notations produced through Infty OCR. 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