Crystal structure of a soluble CD28-Fab complex
Evans, E.J., Esnouf, R.M., Manso-Sancho, R., Gilbert, R.J.C., James, J.R., Yu, C., Fennelly, J.A., Vowles, C., Hanke, T., Walse, B., Hunig, T., Sorensen, P., Stuart, D.I., Davis, S.J.(2005) Nat.Immunol. 6: 271-279
- PubMed: 15696168 
- DOI: 10.1038/ni1170
- PubMed Abstract: 
Naive T cell activation requires signaling by the T cell receptor and by nonclonotypic cell surface receptors. The most important costimulatory protein is the monovalent homodimer CD28, which interacts with CD80 and CD86 expressed on antigen-presenti ...