{
  "shift": "0",
  "ratio": "83/20",
  "free_substrate_reference": "256420892943.185",
  "free_substrate_shifted": "256420892943.185",
  "exact_free_substrate_lower_on_4_1_to_4_2": "2260898025826008319/15168384",
  "kinase_to_substrate_upper": "151683840/2260898025826008319",
  "scope": "Fixed effective rates, target L, enzyme totals and retained ratio interval. A kernel shift preserves free substrate at a fixed ratio but generally changes the compatibility-class total and its equilibrium locations. No stability certificate is transferred to the shifted source."
}