A panel of highly regarded molecular biologists and clinical researchers describe in detail their most novel, useful, and interesting RT-PCR applications. Here the newcomer will find readily reproducible protocols for highly sensitive detection and quantification of gene expression, the in situ localization of gene expression in tissue, and the cloning of genes, as well as for analyzing T-cell clones and the differential expression of genes. For the expert seeking to extend the usefulness of RT-PCR, there are user-friendly applications that complement the latest technological advances, including laser-capture microdissection (LCM), real-time and quantitative PCR, microarray technology, cDNA cloning, and antibody engineering.