In article <CMtBCx.859 at news.cis.umn.edu>, selby at lenti.med.umn.edu (Scott Selby (Med Heme)) wrote: > I (stuff deleted) would like someone (stuff deleted) > to give me an appropriate concentration of G418 for selection Why not use kanamycin instead? It's lots cheaper than G418. Concs in Maniatis etc.