What Makes a Protein Truly Functional? Viability, Usefulness, and Preservation in Debate
What Makes a Protein Truly Functional? Viability, Usefulness, and Preservation in Debate Before claiming that functionality already implies viability, usefulness, and preservation, we should ask: what exactly makes a protein useful within a living system? How do we know it will be preserved across generations? And most importantly, what alternative mechanisms could resolve this paradox before natural selection can act? The Complexity of Isolated Functionality Proponents of the idea that functionality includes viability, usefulness, and preservation certainly seek to simplify explanatory models—which is understandable from the perspective of scientific parsimony. However, experimental data suggests that biological reality is more complex. Biochemist Douglas Axe (2004) demonstrated that only 1 in 10⁶⁴ β-lactamase sequences maintains catalytic function. This alone shows that functionality, by itself, is extremely rare. Even naturalism proponents like Doolittle (2013) openly admit: ...