11. These crystal structures provided vital background on chromophore formation and neighboring residue interactions. 12. In polymers, these areas are known as chromophores . 13. Energy diagram illustrating the Franck Condon principle applied to the solvation of chromophores . 14. When a photon strikes the chromophore , it changes shape ( isomerizes ). 15. In phototransduction, a photon interacts with a chromophore in a light receptor. 16. The parabolic potential curves symbolize the interaction energy between the chromophores and the solvent. 17. The proteins use a flavin as a chromophore . 18. The chromophore absorbs the photon and undergoes photoisomerization. 19. An oxidizing bleach works by breaking the chemical bonds that make up the chromophore . 20. A reducing bleach works by converting double bonds in the chromophore into single bonds.