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. Author manuscript; available in PMC: 2018 Jan 11.
Published in final edited form as: Vaccine. 2016 Sep 28;35(3):496–502. doi: 10.1016/j.vaccine.2016.09.026

Figure 2. Refolding of the RSV F protein.

Figure 2

The F glycoprotein is present in two forms, a metastable prefusion F (preF), the active form on the virion membrane, and the postfusion F (postF) after triggering, refolding and bringing the virus and target cell membrane together to initiate fusion and infection. It is not clear what causes the F protein to trigger.