In summary, we propose a new DNP mechanism, Resonant Mixing (RM), that is mediated by state mixing of the microwaves and the hyperfine interaction. It results in a dispersive DNP field profile when microwave irradiation is applied near the EPR resonance, hence the name. The Zeeman field profile is similar to that observed for TM, and we believe RM explains the DNP Zeeman field profile of the some recently published trityl data .