Pectic acid

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Pectic acid is a linear polysaccharide composed primarily of D-galacturonic acid units. It is a key structural component of the cell walls of plants and is formed by the de-esterification of pectin. Unlike pectin, pectic acid lacks methoxy groups and is therefore less soluble in water and requires the presence of multivalent cations like calcium to form a gel. It is a subject of research in food science and material engineering for its gelling properties and potential applications.