In article <2t7ks6$a9a at mserv1.dl.ac.uk> Dr. I. Dunham, idunham at crc.ac.uk writes: > >Incidently Eric Green has recently found that this colony PCR does not work >reproducibly in thermocylcers with a heated top plate if you omit the >mineral oil. Does anyone have a theory as to why that would be? Dave Knorr