Structural description

Galactoglucomannans are polysaccharides consisting of a mannose backbone with side groups. Main chain is composed of β(1-4) linked D-mannopyranosyl units interspersed with a lower number of β(1-4) linked D-glucopyranosyl units. Single (1-6)-linked α-galactopyranosyl units are found as side groups branched to the mannopyranosyl units. In softwood, the GGMs are O-acetylated at C-2 and C-3 of the mannosyl units. Their structures are numerous due to their ability to be acetylated and due to their wide distribution among higher plants (hemicellulose). They are soluble in alkali.

Possible biomass sources

Galactoglucomannans (i.e GGMs) are a large group of polysaccharides which are prominent components of coniferous woods (almost 20% of dry matter from softwoods are hemicellulosic galactoglucomannan).

GGMs are also found in other wood species as well as in the primary cell walls of other plants, fruits, and seeds, such as flax, tobacco plants, or kiwifruit.


Plant Health Product acting on growth development (Kollarova et al. 2009, Plant Science, 177; 324–330).

Additives with immuno-potentiating and antioxidant properties in food products and pharmaceutical formulations.