Figure 9.

(a) The mean number of receptors bound at the moment of viral fusion, and the mean number of receptors bound at the moment of viral entry (regardless of entry pathway) plotted as functions of the normalized coreceptor binding rate, q₁/p₁. (b) The mean number of coreceptors bound at the moment of fusion and endocytosis, and the average number of coreceptors bound are plotted as a function of the normalized coreceptor binding rate q₁/p₁. The probability that the virus undergoes endocytosis, Q_e is plotted for reference. For both plots M = N = 100, k_f/p₁ = 0.1, k_e/p₁ = 1.