Kinetic analysis of M1PDH purified from the red alga C. continua. A, F6P-reducing activity versus F6P concentration. B, F6P-reducing activity versus NADH concentration. C, M1P-oxidizing activity versus M1P concentration. D, M1P-oxidizing activity versus NAD concentration. ○ and □ indicate assays without NaCl, and • and ▪ indicate assays with NaCl.