Differential splicing of WNK1. Panels A and B show the normalized data and residuals, respectively, of WNK1 for the Affymetrix tissue dataset (see Methods). The three replicates for human kidney tissue are shown as blue lines, and the remaining 10 tissues (30 samples) are shown with black lines. Panel C shows the set of exonic regions joined together in a gene model (green) and the three known Ensembl transcripts (blue). The blue lines linking Panels B and C illustrate the correspondence between probes and exons.