Galactosyl recognizes asialoglycoprotein receptor(ASGP-R) on liver cell surface specifically, and was widely used as ligands in designing liver-target drug delivery systems.

• 半乳糖基可以特异性识别肝细胞表面的去唾液酸糖蛋白受体，而壳聚糖作为一种生物相容性优良的天然高分子材料已广泛地应用于生物材料领域。