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.
Directions See How It's Made. 1  Fill a large pot with water and bring to a boil. 2  Quarter one of the lemons and add to the pot of boiling water. 3  Cut the stems off the artichoke and cut the top inch off from the leaves (optional). 4  Boil the artichokes for 35 minutes or until you can easily pull away one of the lower leaves. Fill individual ramekins with 1 tbsp of butter each and microwave until butter is melted (approximately 30 seconds). Stir the garlic paste into the ramekins of butter.