Galactoglucomannan
Galactoglucomannan is a water-soluble hemicellulose, consisting of galactose, glucose and mannose. Many softwood species, e.g. Norway spruce are rich of galactoglucomannans and can contain it up to 10–20%.{{Cite journal
| last1 = Willför
| first1 = Stefan
| last2= Sundberg
| first2 = Kenneth
| last3 = Tenkanen
| first3 = Maija
| last4 = Holmbom
| first4 = Bjarne
| year = 2008
| title = Spruce-derived mannans -- a potential raw material for hydrocolloids and novel advanced natural materials
| periodical = Carbohydrate Polymers
| volume = 72
| issue = 2
| pages = 197–210
| ref = willfor2008
| doi = 10.1016/j.carbpol.2007.08.006
}}
Structure
File:Structure_of_galactoglucomannan.svg
Galactoglucomannan consists of a backbone of randomly distributed (1→4)-linked mannose and glucose units with (1→6)-linked galactose units attached to mannose units. The hydroxyl groups in locations C2 and C3 in mannose are partially substituted by acetyl groups.