Quantum–Biological Transduction via Ratio-Controlled Regimes and Robust Response Plateaus

Broad response regions in a reaction-rate ratio do not by themselves identify a biological transduction mechanism. This correction audits the earlier quantum-biological transduction preprint, distinguishes its original and later model versions, and checks selected outputs from a related corrected radical-pair study. Nondimensionalization and explicit two-point error bounds show why a fixed recombination-rate ratio does not generally preserve the absolute response when magnetic frequencies remain fixed. A classical two-stage success probability has a broad interior peak and exact rate-scale invariance; this establishes the non-specificity of curve shape, without reproducing magnetic anisotropy. The earlier pumped two-level model also lacks a specified finite readout: its unweighted population integral diverges when its stationary excited population is positive. Reaction generators, normalization, environmental channels and spectral overlap weights therefore require explicit treatment. Original figure producers and the advertised later source archive remain unrecovered. The numerical examples are attributed, known-target secondary evidence; no new spin simulation or biological experiment is reported. Claims of general formalism robustness, isotope catastrophe, cross-species ratio invariance and a physiological explanation are withdrawn. The retained contribution is an auditable correction and a set of model-comparison requirements. A matched-observable mechanism test and a demonstrated biological pathway remain absent. Corrective release containing the revised manuscript and audit supplement. Related Research Square record: https://www.researchsquare.com/article/rs-8800376 . Earlier unsupported interpretations are withdrawn as detailed in the manuscript. This preprint is not peer reviewed.