The Problem

A compound that works on the bench and fails in the field

Five years of development. A molecule that binds its target precisely. Then a field trial — and a single point mutation in that target, and the compound does nothing.

Think of the compound as a key, and the target protein as a lock.

It fits. The molecule sits in the protein's binding site. The compound works.

The lock changes shape. A point mutation alters that binding site.

The same key no longer turns. This is resistance. Not a formulation problem, not a delivery problem — a binding problem, at one site, from one substitution.

The problem isn't that resistance happens. It's when you find out.

Today that mismatch surfaces in an assay or a field trial — years into a program, after synthesis, after formulation, after registration work has begun. The most expensive possible place to learn it.

By then the time, the budget, and the R&D effort have gone into a candidate that was never going to hold against a variant already circulating in the field.