Figure 6.

Mutual inhibition of STS and GOS activity. The reaction mixtures contained 10 mm galactinol, 0 to 50 mm raffinose, and 0 to 20 mm ononitol. Assays were analyzed for both stachyose and galactosylononitol. Data were plotted as follows: A, Formation of stachyose at different concentrations of ononitol with raffinose as the variable substrate. Ononitol concentrations were: 1, 0 mm; 2, 2.9 mm; 3, 4 mm; 4, 6.7 mm; and 5, 20 mm. B, Formation of galactosylononitol at different concentrations of raffinose with ononitol as the variable substrate. The raffinose concentrations were: 1, 0 mm; 2, 7.1 mm; 3, 10 mm; 4, 16.7 mm; and 5, 50 mm.