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. Author manuscript; available in PMC: 2013 Oct 2.
Published in final edited form as: Biochemistry. 2012 Sep 19;51(39):7733–7739. doi: 10.1021/bi3009054

Table 1.

Kinetic constants obtained with fluorinated tryptophans

Trp Substrate kcat (s−1) KM (μM)
L-Trp 0.10 ± 0.01 3.8 ± 0.7
D,L-4-Fluoro-Trp 0.037 ± 0.002 7.6 ± 1.7
D,L-6-Fluoro-Trp 0.011 ± 0.001 2.6 ± 0.3