This document provides information about TaqMan Gene Expression Assay products from Applied Biosystems. It offers pre-designed probe and primer sets (TaqMan Gene Expression Assays) for quantifying gene expression in common model organisms like human, mouse, rat, Arabidopsis, and Drosophila. It also describes options for custom assays with user-designed sequences. The assays use TaqMan chemistry and real-time PCR for sensitive and reproducible gene expression analysis.