Antibodies in diagnostics - from immunoassays to protein chips.

Antibodies are used extensively as diagnostic tools in a wide array of different analyses. Monoclonal and recombinant antibodies provide a never ending source of molecules and can produce endless possibilities for novel genetic constructs. Antibodies are still very much in vogue and are now also being used in microarray analysis of the proteome using protein chips. Here, recent opportunities presented by antibodies as diagnostic tools are reviewed.