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. Author manuscript; available in PMC: 2020 Feb 1.
Published in final edited form as: Biomaterials. 2018 Nov 28;192:475–485. doi: 10.1016/j.biomaterials.2018.11.012

Figure 1. Design and synthesis of zwitterionic polypeptides.

Figure 1.

A. Schematic of the zwitterionic polypeptides (ZIPPs). ZIPPs are homopolymers of a VPX1X2G repeat unit, wherein X1 and X2 are positively and negatively charged amino acids respectively. B. SDS-PAGE of various ZIPPs sequences and the two ELP controls, (VPGAG)120 (control for equal number of repeat units) and (VPGAG)160 (MW controls). The polypeptide bands were compared to a standard MW ladder as a reference.