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CD28/B7 costimulation: a review.
Greenfield EA, Nguyen KA, Kuchroo VK. Greenfield EA, et al. Crit Rev Immunol. 1998;18(5):389-418. doi: 10.1615/critrevimmunol.v18.i5.10. Crit Rev Immunol. 1998. PMID: 9784967 Review.
Mechanism for down-regulation of CD28 by Nef.
Swigut T, Shohdy N, Skowronski J. Swigut T, et al. EMBO J. 2001 Apr 2;20(7):1593-604. doi: 10.1093/emboj/20.7.1593. EMBO J. 2001. PMID: 11285224 Free PMC article.
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