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The Use of Open Source Bioinformatics Tools to Dissect Transcriptomic Data

 Last Update: 2020-11-10
 Source: Internet
 Author: User

Tags

multivariate statistical analysis

gene expression data

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Microarrays are a valuable technology to study fungal physiology on a transcriptomic level. Various microarray platforms are available comprising both single and two channel arrays. Despite different technologies, preprocessing of microarray data generally includes quality control, background correction, normalization, and summarization of probe level data. Subsequently, depending on the experimental design, diverse statistical analysis can be performed, including the identification of differentially expressed genes and the construction of gene coexpression networks.We describe how Bioconductor, a collection of open source and open development packages for the statistical programming language R, can be used for dissecting microarray data. We provide fundamental details that facilitate the process of getting started with R and Bioconductor. Using two publicly available microarray datasets from
Aspergillus niger
, we give detailed protocols on how to identify differentially expressed genes and how to construct gene coexpression networks.

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