Table 3: Hyaluronan synthase classification system as proposed by Weigel and DeAngelis [49].

Class IClass II
ReducingNonreducing

MembersStreptococcus pyogenes, S. equisimilis, S. uberis, humans, and mice Xenopus laevis, algal virus Pasteurella multocida
Hyaluronan chain growthReducing endNonreducing endNonreducing end