Table 2. V_max, K_asp, K_M, α, and α′ Derived from Figure 1 Data.

solution (w/w)	Vmax (μM/s)a	Kasp (×10–3/s)a	KM (mM)b	SSRc	αd	α′d
control	0.291 ± 0.002	1.01 ± 0.03	0.28 ± 0.01	0.00042
30% PEG 8 K	0.367 ± 0.004	0.62 ± 0.02	0.59 ± 0.02	0.000069	1.63 ± 0.07	0.79 ± 0.01
30% PEG 400	0.202 ± 0.002	0.54 ± 0.02	0.38 ± 0.02	0.00036	1.9 ± 0.1	1.44 ± 0.02

^aValues of parameters ±standard deviation fitting data to eq 4.

^bValue of K_m ± standard deviation fitted to eq 1. Fitting to either eq 1 or eq 4 did not significantly alter V_max.

^cSum of squares residues of the fit to eq 4. Number of observations = 18 for each solution.

^dValues ± error estimate. Error calculated by propagating standard deviation of fitted K_asp and V_max, respectively.