Parameters for pyridoxal phosphate

 Has anyone parameterized pyridoxal phosphate for use in a standard
 mechanics package such as CHARMM or AMBER? If so, are they available?
 We would be interested in parameters for simulation of PLP as an enzyme
 cofactor. Other alternatives we are considering are ad hoc parameters and
 deleting the PLP from the structures of interest.
 				Dan Strahs