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. Author manuscript; available in PMC: 2019 Nov 1.
Published in final edited form as: Xenotransplantation. 2018 Jun 22;25(6):e12424. doi: 10.1111/xen.12424

Figure 2.

Figure 2

Common sialic acid forms. Four primary core Sia structures are depicted. Neu5Ac and Neu5Gc are the two most common Sia in mammals. Kdn with a hydroxyl at C–5 is less abundant in mammals, while Neu with a free amine at C–5 is rare in nature