In article <3ai3c3$prg at mserv1.dl.ac.uk>, "k.d.preuss" <tm12kpkp at rz.uni-sb.de> writes: >reviving dead stocks... well, you could spin down the cells and purfy the DNA, then transform it into new cells, that might help... Andy Kravetz Institute for Molecular Virology St. Louis, MO