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. Author manuscript; available in PMC: 2018 Dec 18.
Published in final edited form as: Vaccine. 2017 Nov 14;35(51):7121–7126. doi: 10.1016/j.vaccine.2017.10.081

Fig. 1.

Fig. 1

The O-acetylation process for production of O-acetylated polygalacturonic acid (GelSite-OAc™). The asterisk indicates the use of a small amount of perchloric acid as the catalyst.