Addgene ships all of our plasmids as transformed bacteria in stab culture format. Stab cultures should be stored at 4°C upon receipt. The bacteria in the stab should live for at least 2 weeks when stored at 4°C. You should plan to create a glycerol stock for long-term storage within 2 weeks of receipt. Purified plasmid can also be stored long-term at -20°C.
For more information, view our plasmid handling web page.