Involved in the synthesis of fructan of the inulin neoseries. Has no 1-FFT activity. [1-beta-D-fructofuranosyl-(2->1)-]m+1 alpha-D-glucopyranoside + [1-beta-D-fructofuranosyl-(2->1)-]n+1 alpha-D-glucopyranoside = [1-beta-D-fructofuranosyl-(2->1)-]m alpha-D-glucopyranoside + [1-beta-D-fructofuranosyl-(2->1)-]n+1 beta-D-fructofuranosyl-(2->6)-alpha-D-glucopyranoside (m > 0, n >= 0). Optimum pH is 5.5. Stable between pH 5.0-6.0. Stable up to 37 degrees Celsius. Inhibited by Hg(2+), p-chloromercuribenzoate and Ag(+). Might be processed in two N-terminal and C-terminal proteolytic fragments. Belongs to the glycosyl hydrolase 32 family.