TransforMax EPI300 Chemically Competent E. coli, 10 Reactions1,000X concentrated solution. Filter sterilized. Clone large inserts in standard plasmids, and control copy number of CopyControl vectors. EPI300 Electrocompetent cells are recommended for Gibson Assembly reactions. Key Features: Standard cloning for large inserts and Gibson assembly electroporation Clone large inserts and transform large plasmids up to at least 145 kb plasmid DNA. Generate clones with inducible copy number using CopyControlvect ors.