FLP recombinase is an enzyme.

The FLP protein of the yeast 2-microns plasmid catalyzes intermolecular site-specific recombination with a turnover number of approximately equal to 0.12 min-1 (per FLP monomer) for relaxed DNA substrates. Under conditions that enhance its stability, the protein can be used in catalytic rather than stoichiometric amounts. The reaction rate exhibits a strong dependence on FLP protein concentration even when the protein is present in excess relative to available recombination sites.