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. 2016 Sep 1;6:32498. doi: 10.1038/srep32498

Figure 4. Permeation of human insulin across TR146 buccal cell layers in the presence of increasing glutamic acid concentrations.

Figure 4

(a) Percentage of insulin permeated in the presence of various concentrations of glutamic acid. (b) Comparing the percent enhancement of insulin permeability through TR146 cell layers in the presence of various concentrations of glutamic acid and solution pH. (c) Comparing the solubility at 25 °C and permeability of insulin through TR146 cells layers, of insulin in the presence of various concentrations of glutamic acid.