Fig. 3. Predicted behavior using Crofts model on oxidation of (BChl)2 (to form P+), and cyt (c2 + c1) during continuous illumination in the presence of myxothiazol with different types of chromatphores heterogeneity. Top two frames show a "magic square" plots from points during the "time-course" of illumination, the bottom two frames show the predicted kinetics. On the left, the prediction shows the curves expected for a model with random distrubution of monomer enzymes, with a value for apparent equilibrium constant (Kapp) of about 30. On the right are similar curves assuming dimeric complexes, with a value for Kapp of about 10. The Kapp for homogeneous equilibrium is > 100. Using an iterative algorithm, the program calculates for each of 100 "chromatophores" the distribution of redox states for the couples of the high-potential chain (with or without 2Fe.2S), and accumulates a total of positive charge during successive increments to mimic continuous illumination. The redox components of the chromatophores were distributed at random, using a random number generator.