Extended Data Fig. 10: Electronic transitions in HeimdallR1/xanthophyll complexes.
From: Structural insights into light harvesting by antenna-containing rhodopsins in marine Asgard archaea

Energy level diagram along with the nature of the excited states (LE: local excitation; CT: charge transfer), and natural transition orbitals (isovalue = 0.01 a.u.) displaying the dominant orbitals involved in the electronic transitions of the first three excited states in HeimdallR1/xanthophyll with lutein (a) and fucoxanthin (b). The subscript denotes excitation in retinal (R), lutein (L), fucoxanthin (F) or transition from retinal to the respective xanthophyll. The transition orbitals are shown only for those with contribution greater than 5% towards the excited state (transition contribution between each pair of orbitals is marked in the figure).