## Problem 228 — rank:176

**Title:** Antigen cross-presentation mechanism

**Added binding assumptions (LaTeX):**

```latex
Anchor the conversions between separately normalized endocytic, cytosolic and presentation signals; otherwise a rescaling of a hidden signal can change inferred transport coefficients. Define initial signals and input history. The share weights modeled presentation-production fluxes, not accumulated surface occupancy, which is also affected by clearance. A route family must include comparable observation maps before likelihood agreement is interpreted as mechanism equivalence.
```

**Direct edits:** 0. **Fresh external checks:** None; supplied sources retained as provenance.