A simple nod rapid method is described where human genomic DNA suitabl
e for PCR was prepared from serum by microwave irradiation. We were ab
le to reproducibly amplify single-copy gene sequences up to 442 bp fro
m small quantities of serum without the need for DNA extraction. Genot
yping results obtained from serum samples ir ere shown to be identical
to those derived from purified DNA from the same individuals.