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. Author manuscript; available in PMC: 2010 Dec 2.
Published in final edited form as: Biomacromolecules. 2009 Nov 9;10(11):3122–3129. doi: 10.1021/bm900789a

Figure 1.

Figure 1

Reagents used to fabricate gels. Alginate-PEG-N3 (1) can form gels via divalent ion cross-linking (e.g. Ba2+), as shown in A, or via incubation with MDT-PEG-MDT (2), where spontaneous covalent cross-links between 1 and 2 are formed via Staudinger ligation, as shown in B. Following gel formation with Ba2+, gels may be further functionalized with MDT-labeled agents, such as MDT-PEG-carboxyfluorescein (3), as illustrated in C (fluorescence image, excited with blue light).