22 Microarray probes from manufacturers are aligned to the genome by Ensembl, if the probe sequences are provided. The mapping is a two-step procedure outlined here. Probe2Transcript Annotation 0 \N 11 Probe alignment Probe alignment 1 {"colourset" : "feature","type" : "_oligo","display" : "off","key" : "array_chip"} 12 Probe alignment Probe alignment 1 {"colourset" : "feature","type" : "_oligo","display" : "off","key" : "array_chip"}