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. 2007 May 18;93(4):1116–1123. doi: 10.1529/biophysj.107.106708

FIGURE 2.

FIGURE 2

The stochastic process representing the competition between membrane fusion and endocytosis. The states n correspond to the number of receptor-spike complexes formed, while N is the total number of spikes on the virus membrane. Each receptor-spike complex can initiate membrane fusion with rate kf. As more receptors are bound, the total rate of fusion increases linearly. The irreversible pinch-off and endocytosis rate is denoted ke.