Spectra for Agp1 and Agp2 adducts with doubly locked chromophores. A, 5Za15Ea-Agp1; B, 5Za15Ea-Agp2; C, 5Ea15Ea-Agp1; D, 5Ea15Ea-Agp2; E, 5Zs15Za-Agp1; F, 5Zs15Za-Agp2. Dotted lines, absorption spectra; dashed and solid lines, excitation and fluorescence emission spectra, respectively.