Determining the oligomeric structure of proteorhodopsin by Gd3+-based pulsed dipolar spectroscopy of multiple distances
D.T. Edwards, T. Huber, S. Hussain, K.M. Stone, M. Kinnebrew, I. Kaminker, E. Matalon, M.S. Sherwin, D. Goldfarb, S. Han, Structure, 22 (11) (2014) 1677-1686
https://doi.org/10.1016/j.str.2014.09.008 PMID: 25438671.