Harding was prey to a seething envy: He had wanted badly to discover the relevant biological target for the drug himself, to explain how it worked, to maintain his priority, and had been routed by his brilliantly successful ex-collaborator and friend. As he often did, he also now felt resentful, betrayed, as if by some combination of his own accommodating character and the overpowering forcefulness of those around him, he had been oppressed, pushed aside, rebuked. He felt defeated, a victim. He had come to Vertex two years earlier at the peak of his promise, codiscoverer of cyclophilin and FKBP-12, to collaborate with Schreiber: two young conquerors overtaking the world. But Schreiber had now gone on beyond him alone. Worse, Schreiber’s new work had instantly and thoroughly eclipsed their earlier accomplishments together. A protein’s cachet—and its discoverers’—rose and fell strictly according to its biological significance, what it did. Science, like fashion, could be exceptionally cruel as it moved ahead. And here was Harding, codiscoverer of two proteins that in the end didn’t do anything but present atoms, like servile eunuchs, to the real molecular kingpin, the real “protein of interest.” Because inhibiting FKBP-12 was apparently no longer what mattered for immunosuppression or drug design, so did the protein become instantly marginalized, passé, a footnote. Harding could feel himself going with it. (It was more than spontaneous diminution or paranoia: The next day, Schreiber put up a slide during his speech that credited “Schreiber et al.” with the discovery of FKBP-12. Harding, first author of the Nature paper, was never mentioned.)