FIGURE 3.
Simulations of the ImpeRfection RobUst Partial Transfer (IRRUPT) pulse sequence. Remaining 15N polarization (P15N) after one transfer as a function of (A) 15N excitation frequency offset and 15N maximum pulse amplitude and (D) 1H excitation frequency offset and 1H maximum pulse amplitude. 1H polarization (P1H) after one transfer as a function of (B) 15N excitation frequency offset and 15N maximum pulse amplitude and (E) 1H excitation frequency offset and 1H maximum pulse amplitude. Polarization transfer efficiency P1H/(1−P15N) as a function of (C) 15N excitation frequency offset and 15N maximum pulse amplitude and (F) 1H excitation frequency offset and 1H maximum pulse amplitude. The asymmetry in the profiles results from the use of adiabatic pulses