Fig. 2

Characterization of proteins. A Quantification of the protein content on LA/TCS@PLGA-NPs. Error bars represent standard deviations (n = 3). B SDS–PAGE protein characterization of LA envelope fragments, LA/TCS@PLGA-NPs and L. acidophilus. C Comparison of the S-layer protein content recovered from equivalent amounts of LA envelope fragments, LA/TCS@PLGA-NPs and TCS@PLGA-NPs after LiCl solution treatment (n = 3)