Plasmid  is a small, circular, double-stranded DNA molecule that is distinct from a cell's chromosomal DNA. Plasmids naturally exist in bacterial cells, and they also occur in some eukaryotes. Often, the genes carried in plasmids provide bacteria with genetic advantages, such as antibiotic resistance.
 

【How to handle the plasmid】 

The item is lyophilized form,  Please take the powder plasmid by centrifugation at 5000rpm/min for 1min. Add 20μl ddH2O in to the tube of plasmid.