. . "Pectin (from Ancient Greek: \u03C0\u03B7\u03BA\u03C4\u03B9\u03BA\u03CC\u03C2 p\u0113ktik\u00F3s, \"congealed, curdled\") is a structural heteropolysaccharide contained in the primary cell walls of terrestrial plants. It was first isolated and described in 1825 by Henri Braconnot. It is produced commercially as a white to light brown powder, mainly extracted from citrus fruits, and is used in food as a gelling agent, particularly in jams and jellies."@en .