Patent ID: 7608754

Claim:
A method for producing fructans having a degree of polymerization (DP) of from DP2 to DP5, comprising the steps of: (a) selecting two genes of plant origin which encode different fructosyltransferase enzymes, wherein the two different fructosyltransferase enzymes are 1-SST and 6G-FFT or 1-SST and 6-SFT; (b) operably linking the genes to suitable transcription-initiation and transcription-termination signals to provide an expression construct; (c) transforming a sugar beet or sugarcane host plant cell with the expression construct; (d) regenerating a transgenic plant from the transformed plant cell; (e) cultivating the transgenic plant under conditions enabling the expression of the two fructosyltransferase enzymes during biosynthesis of the fructans; and (f) isolating the fructans from the transgenic plant, wherein the percentage of DP3 is greater than DP2.