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. 2021 Apr 12;143(15):5709–5716. doi: 10.1021/jacs.0c12956

Figure 2.

Figure 2

(A) Structure and enzymological data of the photoswitchable α-chymotrypsin inhibitor PI identified throughout structure–activity-relationship analysis. Inhibition constants were determined using a fluorogenic assay. For details on other synthesized photoswitchable α-chymotrypsin inhibitors, experimental procedures, and results, see 2.1–4.6 of the SI. SF = switching factor; PSS = photostationary state. (B) Batch photoswitching using PI illustrating reversible photoswitching and competitive mode of inhibition. [Cr] = 10 nM, [PI] = 400 μM, [AAPF-AMC] = 80 μM (see 4.5 of the SI for details).