Lucigen’s E. cloni competent cells share the most useful genetic elements of standard cloning strains like DH5a™, DH10B™, JM109, TOP10, etc. and directly replace them in cloning protocols. E. cloni chemically competent cells provide the performance researchers need with ease of use—only common laboratory equipment is required. These cells provide solutions for a wide range of applications at economical prices. E. cloni 10G Competent Cells. Routine cloning, subcloning, and plasmid isolation with or without blue/white screening.