Pullulanase M1 (Klebsiella planticola) (E-PULKP) is specific for α-(1-6) linkages in starch.
Pullulanase M2 (Bacillus sp.), as Pullulanase M2 is known to attack both α-(1-4) and α-(1-6) linkages in starch.
More information can be found in the following document: Starch Fine Structure Research
