Fig. 2

Characterization of liposome vaccines. A Particle size distribution of liposomal nanoparticles. DLS measurements of LP-4S, NLP, NLP-4S and NLP-4S-PBS57 liposomes. B Zeta potential of the four liposome vaccines. C Representative TEM images of liposome vaccines. Liposomal nanoparticles have basically round-shape structures. NLP liposomes were treated by negative staining method, and LP-4S, NLP-4S and NLP-4S-PBS57 liposomes were dyed by positive staining method. Scale bar indicates 200 nm