Hi. BioNetters, Does anyone know any protocol for purify DNA of cosmid clones by equilibrium centrifugation in CsCl-EtBr gradient? Does the protocol for plasmid work same? Thanks in advance. NAKAMURA "Hoichi" Yasukazu yanakamu at lab.nig.ac.jp Evolutionary Genetics Lab. Grad. Univ. for Adv. Studies / NIG