Figure 3.
PC to PP Ca2+ waves can be observed due to gradients of vasopressin receptor recycling rate as well as IP3 synthesis rate independently. Simulation results for PC to PP Ca2+ waves obtained with a (A) linear PC to PP kr gradient (2 to 1/s) with a constant kIP3 value (0.8μM/s), and (b) linear PC to PP kIP3 gradient (0.9 to 0.7μM/s) with a constant kr value (1.5/s) for all hepatocytes. Hepatocytes were numbered from 1 to 15 starting at the hepatocyte closest to the PC region. Either case resulted in diminishing Ca2+ spike amplitude from the PC to PP region. (See Table S4 for all parameters values).