Ca2+ leak is proportional to gradient between Ca2+ and ER
gkatp = 500 if t < than tstim 530 otherwise
Increase of maximal conductance of K_ATP channels from 500 to 530 at time=30000 ms
Fraction of K(ca) channels activated by cytosolic Ca2+
The model is described in the paper by Wu and Chang (2006). Diethyl pyrocarbonate, a histidine-modifying agent, directly stimulates activity of ATP-sensitive potassium channels in pituitary GH3 cells. Biochem Pharmacol. 71(5): 615-23. The unit of time is ms, and the simulation time is 80 s, that is 8e4 ms. Therfore, you probably need to increase the maximum steps for your simulator. The figure 7 has been reproduced by MathSBML. Application of DEPC as indicated at horizontal bar was mimicked by an increase of maximal conductance of Katp-channels from 500 to 530 ps at t=30 s. To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information. In summary, you are entitled to use this encoded model in absolutely any manner you deem suitable, verbatim, or with modification, alone or embedded it in a larger context, redistribute it, commercially or not, in a restricted way or not. To cite BioModels Database, please use: Li C, Donizelli M, Rodriguez N, Dharuri H, Endler L, Chelliah V, Li L, He E, Henry A, Stefan MI, Snoep JL, Hucka M, Le Novère N, Laibe C (2010) BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models. BMC Syst Biol., 4:92.