The application of radioactive isotope99Mo to the reconstituted MoFe protein

By substututing99Mo for the Mo in the reconstituted MoFe protein, the nuclear quadrupole interactions (NQI) of99Mo have been measured using the perturbed angular correlations (PAC). Two well-defined electric quadrupole interaction parameters have been observed. The configuration of the M-Center of the MoFe protein is identified by the quadrupole couplign constant υQ1(412(9)MHz) and the asymmetry parameter η1(0.49(5)). Other parameters, VQ2(1939(13)MHz) and η1(0.90(1)), may correspond to a deformation M—Center of MoFe protein.