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A gene expression bar code for microarray data

Abstract

The ability to measure genome-wide expression holds great promise for characterizing cells and distinguishing diseased from normal tissues. Thus far, microarray technology has been useful only for measuring relative expression between two or more samples, which has handicapped its ability to classify tissue types. Here we present a method that can successfully predict tissue type based on data from a single hybridization. A preliminary web-tool is available online (http://rafalab.jhsph.edu/barcode/).

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Figure 1: Across-sample distributions of gene-expression estimates.
Figure 2: Demonstration of the lab effect and its removal by the bar-code algorithm.

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Correspondence to Rafael A Irizarry.

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Supplementary Figures 1–5, Supplementary Tables 1–6, Supplementary Methods, Supplementary Results. (PDF 3811 kb)

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Zilliox, M., Irizarry, R. A gene expression bar code for microarray data. Nat Methods 4, 911–913 (2007). https://doi.org/10.1038/nmeth1102

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