Table 1. Fitted K_M and v_max values.

	without NaCl		with 100 mM NaCl
batcha	KM [µm]	vmax [µm/min]	KM [µm]	vmax [µm/min]
1	331.84±4.87c	22.30±0.23	98.45±4.68	20.23±0.35
2	260.29±13.47	11.70±0.22	59.26±1.65	13.17±0.19
3	249.77±7.31	15.94±0.24	58.86±4.47	14.90±0.14
4	438.26±22.12	20.79±0.66	185.95±8.73	20.60±0.48
5	246.22±6.09	15.60±0.18	72.55±2.17	16.33±0.30
6	289.68±5.77	22.48±0.36	131.01±7.38	25.45±1.01
7	279.88±8.79	17.49±0.26	78.56±7.01	20.49±0.74
8	316.10±4.88	20.35±0.18	98.74±3.73	21.49±0.27
9	276.95±9.58	15.00±0.23	71.36±2.56	16.81±0.15
average	298.80±45.80	17.96±2.86	94.97±31.59	18.83±2.93
global fit	268.28±4.50	17.26±2.06	79.77±3.05	17.074±1.77

^aPreparation and measurement of batches 1–5 and 6–9 were done by different persons.

^bfit with shared K_M.

^cstandard errors for all data were calculated using Student’s t-distribution at P = 0.05.