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A) Allyl sulfide strategy to reversibly perform thiol-ene reactions indefinitely to dynamically tether biomolecules. Red CRGDS was patterned via multiphoton patterning to afford a cube (B). Green CRGDS was patterned in the shape of a buffalo to exchange the two peptides (C). Finally, nonfluorescent RGDS was patterned in the shape of ‘CU’ to exchange peptides a second time (D).
