The light-harvesting complex (LHC) functions as a light receptor; it captures and delivers excitation energy to photosystem. The minor light-harvesting complexes CP24 (Lhcb6) , CP26 (Lhcb5) , and CP29 have been proposed to play a key role in the zeaxanthin (Zx) -dependent high light-induced regulation (NPQ) of excitation energy in higher plants.
