Plasmid borne genes encoding modifying enzymes such as beta-lactamases, that confer resistance to penicillins and related antibiotics, or, more recently, phosphoethanolamine transferases, that confer ...

The gene coding for GFP comes from the bioluminescent jellyfish, Aequorea victoria, and resides on a DNA plasmid called pGLO. The pGLO plasmid also contains a gene encoding for beta-lactamase.