Crystal Structure of HIV Protein Tat (IMAGE) University of Iowa Health Care Caption A University of Iowa and University of Nebraska study has revealed the structure of an important HIV protein attached to the human protein that the virus hijacks during infection. The structural information might help researchers develop drugs that disrupt HIV replication. Image shows structure of HIV Tat protein (red) bound to human P-TEFb protein (beige and green) superimposed on artist’s rendition of HIV viruses. Credit Tahir Tahirov, University of Nebraska Medical Center, and Narmin Tahirova, University of Nebraska at Lincoln. Usage Restrictions Image may be used only for education/media purposes. Please use appropriate credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.