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Short description:
Please summarise the application in a few sentences. Avoid links here. A Bayesian hidden Markov model to detect enriched locations in ChIP-seq data.
Software version:
Biological application domain(s) (Phylogenetics, Genomics, ...):
ChIP-seq, Simulation experiment
Principal bioinformatics method(s) (Assembly, Mapping, ...):
Statistical calculation
Technology (Sanger, Illumina, 454, SOLiD, Ion Torrent, ...):
Illumina
Interface (Command line, Web UI, Desktop GUI, SOAP WS, HTTP WS, API, QL):
Resource type (Command-line tool, Web application, Desktop application, Script, Suite, Workbench, Database portal, Workflow, Plug-in, Library, Web API, Web service, SPARQL endpoint):
Our proposed statistical algorithm, BayesPeak, uses a fully Bayesian hidden Markov model to detect enriched locations in the genome. The structure accommodates the natural features of the Solexa/Illumina sequencing data and allows for overdispersion in the abundance of reads in different regions. Moreover, a control sample can be incorporated in the analysis to account for experimental and sequence biases. Markov chain Monte Carlo algorithms are applied to estimate the posterior distributions of the model parameters, and posterior probabilities are used to detect the sites of interest. CONCLUSION: We have presented a flexible approach for identifying peaks from ChIP-seq reads, suitable for use on both transcription factor binding and histone modification data. Our method estimates probabilities of enrichment that can be used in downstream analysis.
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