MRC Laboratory of Molecular Biology and MRC Centre for Protein Engineering, Hills Road, Cambridge, CB2 2QH, UK. imt@mrc-lmb.cam.ac.uk
Ever since DNA microarrays were first applied to the quantitation of RNA levels, there has been considerable interest in generating a protein homolog that can be used to assay cellular protein expression. A recent paper describes the first microarray that can be used for such protein profiling.