The light-harvesting complex (LHC) functions as a light receptor, it captures and delivers excitation energy to photosystem with which it is closely associated. The light-harvesting protein Lhca4 is one of the four main and highly conserved types of chlorophyll a/B-Binding proteins (Lhca1-4) of the light harvesting antenna (LHCI) of plant photosystem I. Lhca4 is imported as a precursor from the cytosol into the chloroplast. upon insertion into the thylakoid memBrane Lhca4 forms a heterodimer (LHCI-730) with Lhca1 that associates with the PSI core close to PsaG and PsaF.
