Before revision:  The non-heme iron at the reaction center, the toroidal shape of the light harvestor , the functional role played by the long-lasting spectrometric signal observed, and the photon anti-bunching observed suggest non-reciprocity.
After revision:  The non-heme iron at the reaction center, the toroidal shape of the light harvester , the functional role played by the long-lasting spectrometric signal observed, and the photon anti-bunching observed suggest non-reciprocity.