How engagement of surface T cell antigen receptors 'translates' into intracellular signal cascades remains vague. Genetic and biochemical experiments now allow modification of a model linking ligation of these receptors with CD3? and other cytoplasmic signal-transduction 'machinery'.
Barack Obama said his plan to end the Iraq war was unchanged and he was puzzled by the sharp reaction to his statement that he might "refine" his timetable for withdrawing U.S. combat troops.
AFP - The United States military wanted to test deadly nerve gases on Australian troops in a remote area of far north Queensland in the 1960s but Canberra refused, a report said Sunday.
