STRUCTURE OF PECTIN                                                                              

Pectin molecules have a linear backbone composed of units of (1,4)-linked α-D-galacturonic acid and its methyl ester. The galacturonic acid units may be in the salt form – galacturonate – making pectin an anionic polymer.

The functional properties of a GENU pectin product depend above all on its
degree of esterification (DE). High Ester or HM (high methoxyl) pectins
have a DE above 50%. Low Ester or LM (low methoxyl) pectins have a DE
below 50%.

Sugar beet pectin differs from citrus pectin in that it is partially acetylated.

Completely de-esterified pectin (DE = 0) is termed pectic acid or pectate.
The molecular conformation of sodium pectate is similar to that of the
poly-L-guluronate regions in sodium alginate.

 

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