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. 2020 Jan 7;18:7. doi: 10.1186/s12951-019-0568-x

Fig. 1.

Fig. 1

Expression, purification, and identification of the recombinant PPV-VP2 protein. a SDS-PAGE analysis of the protein expression and purification. b Western blot analysis of the antigenicity of the protein. M: Marker; lane 1: pET-28a vector control; lane 2: un-induced of pET-28a-VP2; lane 3: supernatant after sonication; lane 4: inclusion body; lane 5–6: purified protein