They are essential in B cell antibody class switching, in the activation and growth of cytotoxic T cells, and in maximizing bactericidal activity of phagocytes such as macrophages. Mature T h cells express the surface protein CD4 and are referred to as CD4+ T cells.Such CD4 + T cells are generally treated as having a pre-defined role as helper T cells within the immune system.hey are essential in B cell antibody class switching, in the activation and growth of cytotoxic T cells, and in maximizing bactericidal activity of phagocytes such as macrophages. Mature T h cells express the surface protein CD4 and are referred to as CD4+ T cells.
To boil artichokes: 1  Fill a large stainless-steel or enameled pot with lightly salted water; bring to boiling. 2  Add artichokes and return water to boiling. 3  Reduce heat; simmer, covered, for about 20 to 30 minutes or until you can easily pull out a leaf from the center of an artichoke.
Ready In. 1  Preheat oven to 350 degrees F (175 degrees C). 2  Scrub Jerusalem artichoke tubers and cut out eyes. 3  Mix olive oil, thyme, garlic, and sea salt together in a large bowl; add Jerusalem artichoke pieces and toss to coat. 4  Roast in the preheated oven until Jerusalem artichokes are tender, 35 to 45 minutes.