Wow, indeed, exactly that.

Thanks a lot, Holger.

It may actually be more complicated than that.

Have a lokk at this one too:

http://www.ncbi.nlm.nih.gov.gate2.inist.fr/pubmed/23493420

Here is the publication

Article Disparate Individual Fates Compose Robust CD8+ T Cell Immunity

Yeap, Guillaume, it looks more complex, and seems to depend on the particular degree of differentiation, on whether it is a Cd4 or a CD8 T cells, and also on the environment. I've found an instance of differenciation in an apparent absence of proiferation.

http://www.ncbi.nlm.nih.gov/pubmed/9890441