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. Author manuscript; available in PMC: 2017 Feb 1.
Published in final edited form as: Parkinsonism Relat Disord. 2015 Dec 23;23:86–90. doi: 10.1016/j.parkreldis.2015.12.015

Table 2.

Steady-state kinetic parameters for purified wild type and mutant hTH enzymes

Enzyme form Km, L-Tyr (μM) Vmax, L-Tyr (nmol/min/mg) Km, BH4 (μM) Vmax, BH4 (nmol/min/mg)
hTH WT 16.0 ± 1.8 42.3 ± 12.2 82.2 ± 15.7 43.6 ± 8.9
hTH V81M 32.8 ± 3.5 48.3 ± 15.9 83.0 ± 28.3 47.7 ± 9.9
p-value 0.0049 0.78 0.98 0.77