Figure 3.
(a) 1D 13C CP-MAS spectrum of microcrystalline [U-13C,15N]-GB1 (2.5 mg protein packed in 1.3 mm rotor) obtained at ωr/2π = 65 kHz and ω0H/2π = 500 MHz with low power (~16.25 kHz) TPPM decoupling49,50 during acquisition. (b) Expansion of the aromatic region illustrating the excellent resolution.