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

Fig 1. Compendium analysis and normalization.

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.