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. 2020 Jan 30;10(2):205. doi: 10.3390/biom10020205

Figure 1.

Figure 1

Structure and characterization of the self-assembling peptide (SAP) hydrogel. (A) Linear, chemical and three-dimensional structure of the (RADA)4-SDKP as a precursor of the SAP hydrogel. (B) HPLC graph related to (RADA)4-SDKP. (C) Visual illustration of gel formation by addition of Ca²⁺ to the 0.25% (RADA)4-SDKP solution. (D) Field emission scanning electron microscope (FESEM) images of 0.25% (RADA)4-SDKP hydrogel. (E) Viscoelasticity analysis of the 0.25% (RADA)4-SDKP hydrogel using shear rheometry. (F) MTS assay to test the cellular activity of neonatal mouse cardiomyocytes (NMCMs) after 1, 2, and 3 days of encapsulation in the (RADA)4-SDKP. MTS assay was performed in 3 biological replicates, each replicate included 4 repeats. Data are shown as mean ± standard deviation.