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. Author manuscript; available in PMC: 2013 Feb 14.
Published in final edited form as: Biochemistry. 2012 Jan 30;51(6):1134–1147. doi: 10.1021/bi201206v

Table 6. kcat values of active site mutants.

pH Wild type
kcat (s−1)
Y343N
kcat (s−1)
V474M
kcat (s−1)
Y343F/R472Q
kcat (s−1)
Y343N/R472M
kcat (s−1)
Y343N/R472M/V47M
kcat (s−1)
6.0 13.2 3.17 5.96 1.44 1.35 1.90
7.0 24.2 12.77 11.4 1.73 1.13 3.37
8.0 25.9 13.75 17.8 2.05 1.33 3.58
8.5 26.9 16.91 15.8 2.25 1.42 3.90
9.0 25.7 15.54 19.6 2.31 1.13 5.60
9.5 26.3 8.11 17.1 4.94 0.97 5.23
10.0 13.0 4.38 12.4 2.96 ND* 2.80
*

Not Determined