Use of microarrays

Microarray-based gene expression analysis has the big advantage of being quantitative and sensitive to low-abundance transcripts. In addition, microarrays can, if enough sequence is available for a particular organism, represent the expression of an entire genome in a single experiment.

At the time of writing, microarray chips for various organisms are available either commercially, or at cost from certain universities. These include mouse, human, Arabidopsis, tomato and barley, along with a growing number of others.