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Apophytochromes incorporate chromophore 12-monoamides. (A) PCB12MA (solid line) was assembled with apoCph1 to give the PCB12MA adduct Cph1-PCB12MA, which has a dual-Pr spectrum (dashed line; peaks indicated). (B) BV12MA (solid line) was assembled with apoDrBphP to give the BV12MA adduct DrBphP-BV12MA, which has a similar dual-Pr spectrum (dashed line; peaks indicated). Spectra are normalized to the blue/UV (Soret) band.
