Cover design The accessible surfaces of wildtype (far left) and surface mutants (centre two) of monomeric bacteriorhodopsin are shown, where yellow = hydrophobic residues, purple = polar residues and red and blue show negatively and positively charged residues, respectively. Also shown (far right) is a representative water soluble helical protein, Fis. For further details see Mitra, Steitz and Engelman, pages 485-492.
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