Low-power homonuclear dipolar recoupling using supercycled symmetry-based and exponentially-modulated pulse sequences

► Combined symmetry-based and exponentially-modulated field dipolar recoupling. ► Low-power pulse sequences for biological solid-state NMR spectroscopy. ► 13C-13C coherence transfer at high MAS spinning frequencies. ► 13C-13C coherence transfer with approximately 70% transfer efficiency. ► 2D 13C-13C correlation spectra of amyloid fibrils at 30.3 kHz spinning.