Insight into the electronic structure of the CP47 antenna protein complex of photosystem II: hole burning and fluorescence study

The low temperature (T) optical spectra of the isolated CP47 antenna complex from Photosystem II (PSII) with a low-T fluorescence emission maximum near 695 nm are reported. The 695 nm fluorescence maximum which shifts blue with increasing fluence provide important constraints and parameters for future excitonic calculations and offer new insight into the excitonic structure and composition of low-energy absorption traps.