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(2008), and transcriptomic services were provided by Source-Bioscience (Nottingham, UK). The raw data (.CEL files) from each of the 23 rat Genechip 230 2.0 microarrays was then loaded into GeneSpring? GX11 (Agilent Technologies, Stockport, UK), where they were summarized with Mas5 (which incorporates a scaling normalization) and transformed to the median of all samples. All raw data have been submitted to the NBCI Gene Expression Omnibus (GEO; http://www.ncbi.nlm.nih.gov/geo, Accession [http://en.wikipedia.org/wiki/Diglyceride diglyceride] number: GSE26660) and supplemental files S1-S16 are available here: http://www.vasopressin.org/#/data-bank/3755442. Data were used to compile catalogues of genes flagged as ��Present�� in each independent microarray set from each of the five experimental groups; control SD (SD; S2, n= 4), dehydrated (DSD; S3, n= 4), fasted (FSD; S4, n= 5), normotensive (WKY; S5, n= 5) and hypertensive (SHR; S6, n= 5). Any data points called ��Marginal�� or ��Absent�� in any microarray were removed at this stage. To provide a basis for further analysis, the individual lists of genes considered Present in each condition were combined in a manner that excludes repetition of any single probe, either SD + WKY or SD + FSD + DSD + WKY + SHR. Note that while by definition this list represents genes that are flagged [http://www.selleckchem.com/products/iox1.html selleck chemicals llc] as Present in one or more of the experiments, some genes may be considered Marginal or Absent in one or more of the other conditions. Statistical analysis comprised Welch ANOVA with Tukey's post hoc test and Benjamini�CHochberg (B&H) multiple testing correction (P value to 0.05). Appropriate comparisons that resulted from the post hoc test were subsequently filtered with a 1.5-fold cut-off. Gene ontology (GO) analysis was performed on the WKY versus SHR comparison (P 1.5-fold) and used Benjamini�CYekutieli multiple test correction P [http://www.selleckchem.com/products/i-bet-762.html I-BET-762 research buy] microarray replicates. We have measured variability in our microarrays by comparing average correlation coefficients using all data from each chip. Across all 23 microarrays, the correlation is exceptionally strong (r= 0.96; ��M= 0.0005), a trend repeated between individual comparisons (S1). For each condition, we then established lists of genes that are flagged as Present in all of the microarrays for that condition, resulting in 15,396 genes in the SD (S2), 16,088 genes in the DSD (S3), 15,616 genes in the FSD (S4), 15,739 genes in the WKY (S5) and 15,563 genes in the SHR (S6; Fig. 1). We hypothesize conservation of AP gene expression between two closely related species, such as the rat and the mouse.