The GtfD 4,6-α-glucanotransferase enzyme of Paenibacillus beijingensis  is member of the glycoside hydrolase family 70. It produces two reuteran-like polymers distributions were generated from amylose V: a high-molecular mass polymer (HMMP) and a low-molecular mass polymer (LMMP) containing both long linear α(1→4) chains. The HMM polymer with an average lenght of 27 MDa has a linkage ratio α(1→4):α(1→6)= 71:29, and the LMM polymer (19 KDa) has a linkage ratio α(1→4):α(1→6) = 77: 23 %, indicating the HMM has a slighly higher amount of α(1→6) linkages.

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*Activity was measured by following the release of glucose from sucrose. One unit of enzyme activity is defined as the release of 1 μmol of fructose per minute.