6G7J:
reference: Retinal isomerization in bacteriorhodopsin captured by a femtosecond x-ray laser., Nogly P, Weinert T, James D, Carbajo S, Ozerov D, Furrer A, Gashi D, Borin V, Skopintsev P, Jaeger K, Nass K, Bath P, Bosman R, Koglin J, Seaberg M, Lane T, Kekilli D, Brunle S, Tanaka T, Wu W, Milne C, White T, Barty A, Weierstall U, Panneels V, Nango E, Iwata S, Hunter M, Schapiro I, Schertler G, Neutze R, Standfuss J, Science. 2018 Jun 14. pii: science.aat0094. doi: 10.1126/science.aat0094. PMID: 29903883

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