What is the fine-grained topic of the following text: Tregs express a gene called lymphocyte activation gene-3(LAG-3 or CD223) that is a protein that is in the same family as the identifying CD4 proteinfound on normal helper T cells buy generic provigil canada which participates in MHC-class II binding during antigenspecific CD4 activation by APC. Only return the topic.
The expression of the lymphocyte activation gene-3 (LAG-3 or CD223) in Tregs (T cells) and its role in antigen-specific CD4 activation.