Masking of a cathepsin G cleavage site in vivo contributes to the proteolytic resistance of major histocompatibility complex class II molecules. - Burster, Timo; Macmillan, Henriette; Hou, Tieying; Schilling, James; Truong, Phi; Boehm, Bernhard O.; Zou, Fang; Lau, Kenneth; Strohman, Michael; Schaffert, Steven; Busch, Robert; Mellins, Elizabeth D. (Immunology, 2010)