PDONR 221 EA，12536017，Invitrogen

Gateway® Technology enables rapid cloning of one or more genes into virtually any protein expression system. Once you have an entry clone, you can recombine your gene of interest into a variety of expression vectors adapted for use in Gateway® Technology. The PCR product is directionally cloned with efficiencies typically >99%. The pDONR™221 vector has a pUC origin for high plasmid yields and universal M13 sequencing sites for ease of use.