- plasmid prep
Generic term for the isolation of recombinant plasmids from liquid bacterial culture, usually by alkaline/detergent lysis, selective precipitation of other components, and affinity purification of plasmid. As this is the most exciting thing most molecular biologists ever do, there is an informal shorthand for the scale of the preparation based on the size of the overnight culture: see miniprep, midiprep, maxiprep and megaprep.
Dictionary of molecular biology. 2004.