We have published an article on the effect of sucrose concentration and temperature on the levansucrase from Zymomonas mobilis. The three activities displayed by this enzyme were studied: formation of levan (polymerization), production of short-chain fructooligosaccharides (FOS), and sucrose hydrolysis.
Reference: “Levan versus fructooligosaccharide synthesis using the levansucrase from Zymomonas mobilis: effect of reaction conditions”. P. Santos-Moriano, L. Fernandez-Arrojo, A. Poveda, J. Jimenez-Barbero, A.O. Ballesteros and F.J. Plou. Journal of Molecular Catalysis B: Enzymatic, DOI: 10.1016/j.molcatb.2015.05.011(2015)