Potential Usefulness of Streptococcus pneumoniae Extracellular Membrane Vesicles as Antibacterial Vaccines

Figure 1

Purification of Streptococcus pneumoniae BAA-255 extracellular membrane vesicles (EMVs). (a) Summary of the method used to prepare S. pneumoniae BAA-255 EMVs. (b) SDS-PAGE of the EMVs before and after sucrose gradient fractionation. (c) Transmission electron microscopy of the EMVs. Red arrows indicate EMVs.

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