Figure 1From: Cross-species and cross-platform gene expression studies with the Bioconductor-compliant R package 'annotationTools'Strategies to perform an Affymetrix to Illumina cross-platform mapping and an Affymetrix to Affymetrix cross-species mapping (A and B respectively, see text for details). Probe, RefSeq and gene identifiers (upright characters) are mapped using various functions in annotationTools (italic characters) that mine different databases (boxed text).Back to article page