TABLE 1.

Structure characterization of Astragalus polysaccharides (APS).

No.	Name	Molecular weight	Main structure	Bioactivity	References
1	LMw-APS	5.6 × 103	Backbone composed of (1→4) linked glucose and some (1→2) linked Xyl and (1→3) linked GalA	Immunomodulatory activity	Qu (2010)
2	APS	2 × 104–6 × 104	(1→4)-α-glucan, arabinogalactan, rhamnose-galacturonic acid glycan, and arabinose-galactose proteoglycan	Immunomodulatory activity	Qing-yang et al. (2017)
3	APS	2.07 × 104	(1→4)-linked Glc backbone with a (1→6)-linked Glc branch	Antioxidant and immunomodulation	Niu et al. (2011)
4	APS	8.7 × 103–4.8 × 106	Backbone composed of α-(1→3) glucose and some (1→4), (1→6) glucoses	Antitumor	Zhen-yuan et al. (2011)
5	AMon-S	7.6 × 104	Mainly α-arabino-β-3,6-galactan-type structural units	Reticuloendothelial system-potentiating activity	Shimizu et al. (1991)
6	APS	1.6 × 106	Glucose, galactose, mannose, and arabinose	Antioxidant activity	Yan et al. (2010)
7	APS	1.2 × 104–3.6 × 104	Backbone mainly composed of α-d-(1→4)-linked Glc	Antiatherosclerosis and antidiabetes	Wang et al. (2010)
8	cAMPs-1A	1.23 × 104	α-glycosidic linkage	Immunomodulation and antitumor	An-Jun et al. (2017)
9	A2Nb	6.99 × 104–1.58 × 105	Arabinogalactan	Immunomodulation	Wu X. et al. (2011)
10	APS4	1.23 × 104	(1→2)-α-d-Glcp and (1→2,6)-α-d-Glcp	Antitumor	Yu et al. (2019)