The analysis of gene expression is a common experiment conducted routinely in the laboratory. Profiling gene expression provides vlauable insight into genes involved in normal cell/tissue homeostasis, organisms development and informaiton about genes, that wehn their expression is up or down-regulated, lead to disease.
A number of methdos are currently employed to examine gene expression with the most common being Northen blotting, RNase Protection Assay (RPA) and Real-time Polymerase Chain Reaction (RT-PCR).