Secretory immune system of rabbit ocular adnexa

tial, as seen from an initial rapid rise of each slow PHI in Fig. 3, but the contamination is again small enough for the present purpose. The three sets of tracings in Fig. 3, B, show the result of simulation with the use of the circuit in Fig. 1, B, with three different values of time constant (4.5, 9, and 18 sec) and each rod potential in Fig. 3, A, used as an input. The tracings show that the difference in time constant does not affect critically the configuration of the simulated slow PHI but that a value of 9 sec gives tracings closest to the actual slow Pill's, supporting the result of Matsuura et al. A slight deviation seen in the decay phase between the actual and simulated slow Pill's suggests a time constant a little longer than 9 sec for a better fit but not necessarily a change in our interpretation of the underlying mechanism.