Including protons in solid-state NMR resonance assignment and secondary structure analysis: The example of RNA polymerase II subunits Rpo4/7 - Torosyan, Anahit; Wiegand, Thomas; Schledorn, Maarten; Klose, Daniel; Guentert, Peter; Boeckmann, Anja; Meier, Beat (Biological Magnetic Resonance Bank, 2019)