Table 1.

Kinetic analysis of sucrose transport by His-65 mutants of AtSUC1 expressed in S. cerevisiae DBY2615

H65X	Vmax, nmol/mg⋅min	Km, mM
Wild type	0.177	0.500
H65D	0.021	0.367
H65G	0.104	0.526
H65K	2.52	4.26
H65L	0.129	0.794
H65N	0.134	0.800
H65Q	0.285	1.36
H65R	1.52	2.67
H65S	0.148	0.754
H65Y	0.101	0.410