TABLE 2.

Structurally described charged polysaccharides from seagrasses.

Major monosaccharide components1	Linkages	References	Proposed structure
	1,4- and 1,3-linked Gal, 2- and 4-O sulfated	Aquino et al. (2005)
	1,4-linked GalA; 1,2-linked Api	Gloaguen et al. (2010)
	1,4-linked Gal, 6-O-sulfated	Kolsi et al. (2016)	not enough data
	1,4-linked GalA; 1,3-linked Api	Lv et al. (2015)
	not determined	Silva et al. (2012)	not enough data
	1,3-linked Gal; 1,4-linked GlcA; terminal Ara	Pfeifer et al. (2020)

Major polysaccharide components are symbolized using the Symbol Nomenclature for Glycans (SNFG) of the NCBI-Glycan Page (National Center for Biotechnology Information (NCBI), 2020). Abbreviations: Api, apiose; Ara, arabinose; Gal, galactose; GalA, galacturonic acid; and GlcA, glucuronic acid. ¹monosaccharides are treated as “major” if they contribute more than 10% of the polysaccharide.