. 2018 Aug 18;115(6):1130–1141. doi: 10.1016/j.bpj.2018.08.015

Table 1.

Description of Ca fluxes in the Phenomenological Model

Flux	Description
$J_{r}^{b}$	Total RyR flux from the boundary SR to the boundary cytosolic space.
$J_{u p}^{b}$	Total uptake flux from cytosol to SR on the boundary.
$J_{r}^{i}$	Total RyR flux from JSR to cytosolic space in the cell interior.
$J_{u p}^{i}$	Total uptake flux from cytosol into the bulk NSR in the cell interior.
$J_{b i}$	Total diffusive flux from boundary to interior cytosol.
$J_{b s r}$	Total diffusive flux from boundary to interior NSR.
$J_{n i}$	Total diffusive flux from NSR to JSR in cell interior.
$J_{C a}$	Total LCC current at cell boundary.
$J_{N a C a}$	Total NaCa exchanger current at the cell boundary.