Antigen presentation.

[Kiley R. Prilliman]

Craig Webster wrote:
> 
> Hi,
> 
> I remember when I did my degree approx. 5 years ago that there was some debate
> as to whether antigen presentation and activation of T-cells involved one or
> two receptors. e.g.
> 
> One antigen presentation receptor and one MHC receptor or
> A combined MHC and antigen receptor.
> 
...the antigen is bound within a groove formed by the a1 and a2 domains 
of class I molecules or a1 and b1 domains of class 2 molecules...(is 
this what you wanted to know?)