These cDNA microarrays were obtained from the Albert Einstein College of Medicine microarray facility. PCR products of 27400 sequence verified mouse clones were spotted in each array. The clones are from 3 sources: the 8968 clones in the MGEM1.0 plates from Incyte, the 14208 clones in the MNCI-V1 plates from NCI (see http://lgsun.grc.nia.nih.gov/cDNA/15k.html), and the 4224 clones in the MIMP-V1 plates originally from Research Genetics.