Moreover, calculations of exciton Hamiltonians and absorption spectra of the diatom P. tricornutum FCP complex, performed without accounting for the effect of surrounding protein, may need to be reconsidered due to the surprisingly large energy shift of the Chl-c molecules in the present FCP complex . At the same time, in another recent investigation utilizing a QM/MM framework on a single optimized structure a red shift in the energy of the Chl-c Q y peak was observed supporting the present findings .