The retraction notice posted by Nature indicates that two of the paper’s six authors did not agree to voluntarily retract the paper; three agreed to the retraction, while one author did not respond. One of the coauthors who did not agree with the retraction, former UAB researcher M. Krishna Murthy, was found “solely responsible for the fraudulent data” by the UAB investigation.
The retracted Nature paper described the crystal structure of a protein called C3b, which plays a role in immune response pathways. The manuscript raised red flags soon after it was published, as it contradicted other published models. UAB launched an investigation into the discrepancies in 2006, and published its findings concerning misconduct on the part of Murthy in 2009. According to Retraction Watch, the paper has been cited more than 40 times.