Model number: 0055
An ion channel, a sodium calcium exchanger in the surface membrane (sarcolemma) of mammalian pacemaker cells. A mathematical model for the electrophysiological responses.
The following figures were all generated with JSim. They can be reproduced by downloading the project file, or running the applet (below).
Figure 1 displays the pacemaker and action potential waveforms. Figure 2 shows the first derivative (dV/dt) of the model-generated waveform. Figure three gives the total background (IB), pump (INaK and ICaP), and exchanger (INaCa) currents.
Figure 4 displays the transmembrane ionic currents (ICa,L and IK). Figure 5 gives the Current vs Voltage plots for the major ionic currents (ICa,L, IK, and INaCa).
All currents are given in picoamps, all voltages are in millivolts, and all time is given in seconds.
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Copyright (C) 1999-2009 University of Washington. From the National Simulation Resource, Director J. B. Bassingthwaighte, Department of Bioengineering, University of Washington, Seattle WA 98195-5061. Academic use is unrestricted. Software may be copied so long as this copyright notice is included. This software was developed with support from NIH grant HL073598. Please cite this grant in any publication for which this software is used and send one reprint to the address given above.
Model development and archiving support at physiome.org provided by the following grants: NIH/NIBIB BE08407 Software Integration, JSim and SBW 6/1/09-5/31/13; NIH/NHLBI T15 HL88516-01 Modeling for Heart, Lung and Blood: From Cell to Organ, 4/1/07-3/31/11; NSF BES-0506477 Adaptive Multi-Scale Model Simulation, 8/15/05-7/31/08; NIH/NHLBI R01 HL073598 Core 3: 3D Imaging and Computer Modeling of the Respiratory Tract, 9/1/04-8/31/09; as well as prior support from NIH/NCRR P41 RR01243 Simulation Resource in Circulatory Mass Transport and Exchange, 12/1/1980-11/30/01 and NIH/NIBIB R01 EB001973 JSim: A Simulation Analysis Platform, 3/1/02-2/28/07.