a B cell must endocytose an antigen and present it on MHC-II How could you tell if a particular pathogen produced a superantigen toxin when it infected a patient? Look for the release of cytokines from helper T (TH) cells that do not recognize the pathogen. ...
Adding a warning sign with a reflective film on the rubber block pier can better remind the driver of the warning sign. Rubber wheel stopper are installed behind parking spaces to limit the accurate parking position of vehicles, to avoid collision with other vehicles offside when rever...