Structure of Gellan Gum

The molecular structure of gellan gum is a straight chain based on repeating glucose, rhamnose and glucuronic acid units. In its native, or high acyl form, two acyl substituents Ð acetate and glycerate Ð are present. Both substituents are located on the same glucose residue and, on average, there is one glycerate per repeat and one acetate per every two repeats. The high acyl form produces soft, elastic, non-brittle gels, whereas the low acyl form produces firm, non-elastic, brittle gels.

Structure of Native or High Acyl Gellan Gum

Structure of Low Acyl Gellan Gum

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