The TaqMan Genomic Assay (Applied Biosystems) line, for real-time PCR gene expression analysis, has been expanded to include model organisms Arabidopsis and Drosophila. The new assays, consisting of ready-to-use probe and primer sets, are available through the Applied Biosystems e-commerce Web site at http://store.appliedbiosystems.com. Arabidopsis products include 95,000 assays for approximately 26,000 genes, while the Drosophila tests include 38,000 assays for approximately 13,000 genes. The initial release is designed around the well-characterized transcripts in the NCBI Reference Sequence Project (RefSeq) database for these genes. The assays run on Applied Biosystems’ real-time PCR systems, including the 7300, 7500, and 7900HT. Arabidopsis is the standard model genome used in plant science and agriculture studies. Drosophila, or fruit fly, is a model organism for studying developmental biology with numerous implications for human disease research. The Web interface offers a choice of powerful search options enabling researchers to quickly identify the assays relevant to their research. Search options include key words, such as gene symbols, public accession numbers, classification by molecular function, and a batch identification function, allowing scientists to import a file of many targets to search simultaneously. Customers are provided with NCBI and assay identification numbers, as well as other pertinent biological information.