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Fluorescence (FL) spectral time traces from single LHCII trimeric complexes at 5°C, acquired during continuous irradiation corresponding to a power of 1 μW at 630 nm. FL was binned into 1-s integration times. The distinct spectroscopic states are denoted by I, II and III, respectively, where I/III indicates alternation between states I and III. Spectra on top are the time averages of the respective spectral states. FL is expressed in counts per second (cps).
