Individual saccharide residues are termed monosaccharides. It is a compound of a salt with an inert anion like benzoate or saccharide. The bacteria are sustained with a carbohydrate diet consisting of simple saccharide molecules. Proteins can also be modified to include non-peptide components, such as saccharide chains and lipids. It is composed of seven amino acids and three saccharide units. Crystal structures of BanLec suggest that the lectin has two saccharide binding sites. Each beta4GalT has a distinct function in the biosynthesis of different glycoconjugates and saccharide structures. Erythrose is a tetrose saccharide with the chemical formula CHO. The projection is unrealistic, as a saccharide would never adopt this multiply eclipsed conformation. Older papers use the "erythro/threo" nomenclature familiar from saccharide chemistry. Further research led to the development of iron saccharide in 1947.