The structures of light harvesting peptide, LH1, and cofactor, bacteriochlorophyll A. The peptide structure is extracted from the light harvesting complex containing 64 peptides, 4JC9. The cofactors (yellow sticks) contacting with it are also extracted. Red sticks denote the hydrophobic core residues. The colors of the surface from brown (the most hydrophobic) to blue (the most hydrophilic) indicate the hydrophobicity. The graph is generated from the Discovery Studio 4.0.