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. 2015 Mar 16;11(3):e1004127. doi: 10.1371/journal.pcbi.1004127

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© 2015 Kim et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Fig 1 — (A) The E. coli Gene Expression Compendium (EcoGEC) is constructed from raw genome-wise transcriptional data (B) Principal Component Analysis on the EcoGEC before (inset) and after (main) normalization through linear transformation. p1 and p2 represent first and second principal component respectively. Platform biases are corrected by performing platform-specific categorization of gene expression values.