Dipeptidyl peptidase IV (CD26) on T cells cleaves the CXC chemokine CXCL11 (I-TAC) and abolishes the stimulating but not the desensitizing potential of the chemokine - Ludwig, A; Schiemann, F; Mentlein, R; Lindner, B; Brandt, E (J Leukoc Biol, 2002)