. "Combining with interleukin-1 to initiate a change in cell activity via signaling pathways and mediated by adaptor proteins." . . "interleukin-1, Type I, activating receptor activity" . "IL-1 type I, activating binding" . "IL-1 type I, activating receptor" . "interleukin-1 activating receptor activity" . "interleukin-1 Type I receptor activity" . "interleukin-1, Type I, activating binding" . . . .