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.
Trim the stems to 2 inches from the base of the artichoke. Cut off and discard the top 1/2 inch of the artichokes. Cut the artichokes in half. Use a strong metal spoon to scoop out the fuzzy chokes and the small inner artichoke leaves.he trick is to steam them first. Artichokes take a long time to cook, and like moist heat, so itâs best to just grill them at the end for the grill marks and smoky flavor. Cut them in half so the steam penetrates the center more easily and the artichokes cook faster and more evenly.