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Ribbon representation of PYP in (top) the crystal structure of the receptor state pG and (bottom) a typical conformation of the signaling state pB at ambient conditions, taken from the PT run and clearly exhibiting pB features. Red indicates the N-terminal cap, with the Phe6, Phe28, and Phe121 in space-filling model representation to show the hydrophobic core. The yellow stick models represent the chromophore and Glu46.
