MHC class II molecules are of central importance to the adaptive immune system. MHC-class-II-mediated peptide presentation is essential for positive and negative selection of CD4 + T cells in the ...

In addition to their classical function in antigen presentation and their lesser known ability to act as signal transducers, major histocompatibility complex class II molecules are now shown to ...

We first see the Zone system in Art. 505, which provides this alternative system for Class I locations (the combustibles are gases). The Zones are 0, 1, and 2. But if the combustibles are dust or ...