Skip to main content
. Author manuscript; available in PMC: 2010 Dec 22.
Published in final edited form as: Bull Math Biol. 2009 Dec 16;72(3):611–644. doi: 10.1007/s11538-009-9463-1

Fig. 19.

Fig. 19

Phase portraits of iTreg versus effector dynamics over 20 days. (a) Phase portraits for five different precursor frequencies, T0(0) = 0.0004, 0.004, 0.04, 0.4, and 4k/μL. The curve for T0(0) = 0.04 shows the same dynamics as Fig. 18. (b) Phase portraits for three different precursor frequencies, T0(0) = 0.004, 0.04, and 0.4k/μL, corresponding to T cell dynamics under persistent antigen stimulation, i.e., b = 1,000 days.