SANTA CLARA, Calif.--(BUSINESS WIRE)--March 27, 2006--Affymetrix Inc. (Nasdaq:AFFX) announced today the launch of nine tiling array products for five different organisms, further expanding the industry's broadest selection of whole-genome microarrays. Researchers in any laboratory can use the GeneChip(R) tiling arrays to map sites of DNA-protein interaction in chromatin immunoprecipitation (ChIP)-on-chip experiments, discover new RNA transcripts or investigate global epigenomic changes like methylation or acetylation.