Release Notes

Fluxion

What's New

Fluxion now models the cell as one organ within a whole body, and adds a new Body view for moving between a cell and the bloodstream it shares. The simulation engine and biochemistry are unchanged — a run is identical to before — but the workspace is now built around a shared bloodstream, ready for more organs to be added over time.

• A new Body view gives you a zoomed-out picture of the organism. Click the muscle cell to work with it exactly as before; click the Bloodstream to scope every analysis tab — the live plot, the metabolite explorer, reaction capacity, diagnostics, and the flow map — to the shared blood pool alone. From the bloodstream you can watch what the cell exports, such as lactate and protons, accumulate in the blood and then clear from it.
• Under the hood, Fluxion is now assembled as a whole body whose cells share one bloodstream. This is the foundation for modeling several organs at once — for example a future liver that takes up the lactate a working muscle produces, the Cori cycle. This release ships that foundation with the muscle cell as the single organ, so results are byte-for-byte identical to the previous version.
• The live plot gains time-axis controls beside the metabolite picker. Follow (the default) keeps the newest values pinned to the right edge and widens the time axis as the run advances; Max frames the whole planned run window at once. The concentration axis now only ever widens to admit a new range and never shrinks back, so an earlier peak stays on scale as the run continues.
• The plot's concentration axis now labels itself in whole units — mM, µM, or nM — as you zoom into small values, instead of showing a "×0.001" multiplier, and traces no longer appear to shift or stretch as you pan and zoom. Several smaller live-plot issues, surfaced while building the bloodstream view, were fixed along the way.

Bug Fixes

• While viewing the bloodstream, starting a guided exercise or applying one of its presets no longer pulls the cell's internal metabolites onto the blood-only plot. The plot now keeps to the metabolites that belong to the view you are in.

Known Issues

• During prolonged oxygen-free work the modeled cell still settles slightly alkaline instead of acidifying. Blood is buffered so its pH stays realistic, but the muscle's long-run acid balance lands a few tenths of a pH unit too high; correcting it needs deeper work on the cytosolic acid budget.