Figure 2

Chl–Lut resonance interaction \({{\boldsymbol{J}}}_{{{\boldsymbol{Q}}}_{{\boldsymbol{y}}}{{\boldsymbol{S}}}_{1}}\) as a function of the Chl rotation around the z axis. Results for L1 and L2 sites of a single Lhcb1 monomer (red and blue, accordingly) are qualitatively identical, except for a shallow local minimum for L1 site at −15°. Dots correspond to the calculated values, lines correspond to the spline interpolated values. The inset shows the dependence in the immediate vicinity of the original orientation at which the couplings are 2.6 cm⁻¹ and 2.7 cm⁻¹ for L1 and L2 sites, accordingly.