Fig. 2
Characterization of nanoparticles (NPs) and released encapsulants. a Scanning electron micrographs (scale bar—200 nm). b Hydrodynamic size (polydispersity index) and c Zeta potential of—Control NPs (Blank), LPS encapsulated NPs, IpaB44-310 encapsulated NPs and IpaC encapsulated NPs respectively. The NPs were dissolved and the released encapsulants were analyzed. d Silver staining of released LPS. e and f SDS PAGE of released IpaB44-310 and IpaC respectively (arrow heads pointing to bands). g Release of model antigen IpaB44-310 as a function of time