SENSING PHOTONS

Structures of two short-lived intermediates during the photocycle of t he photoactive yellow protein (PYP) have been determined using X-ray c rystallography. These structures demonstrate the power of cryo-trappin g and the Laue method in trapping transient intermediates.Structures o f two short-lived intermediates during the photocycle of the photoacti ve yellow protein (PYP) have been determined using X-ray crystallograp hy. These structures demonstrate the power of cryo-trapping and the La ue method in trapping transient intermediates.