Fig. 5-6. S-proteins pH optima for activity. SP-I 

 and SP-II pH optima were determined with purified enzymes 

 (using 4ng and 8ng protein, respectively) in a range from 

 pH 6 to pH 10. Shikimate dehydrogenase activity was 

 determined in the presence of 200 mM Bis Trispropane 

 buffer at the indicated pH values. Dehydroquinate 

 dehydratase activity was determined with 100 mAf potassium 

 phosphate, Epps, or glycine buffer at appropriate pH 

 values for each. 



