Table I. Kinetic parameters of the interaction of Anabaena NTRC with 2-Cys Prx from different sources.

Reactions were performed at a fixed concentration of AnabNTRC (2 μm) and variable concentrations of the 2-Cys Prxs in the presence of 0.25 mm NADPH. Data are means ± sd of three determinations.

Source	Vmax	Km	Kcat	Kcat/Km
	μmol min−1	μm	s−1	μm−1 s−1l
Anabaena 2-Cys Prx	169 ± 6.4	2.84 ± 0.3	2.81 ± 0.1	0.99
Rice 2-Cys Prx	170.1 ± 6.98	7.9 ± 0.4	1.42 ± 0.06	0.18
Arabidopsis 2-Cys Prx A	138 ± 2.9	5.9 ± 0.4	1.15 ± 0.1	0.19
Arabidopsis 2-Cys Prx B	114.3 ± 0.7	6.3 ± 0.2	0.95 ± 0.007	0.15