Saposins modulate human invariant Natural Killer T cells self-reactivity and facilitate lipid exchange with CD1d molecules during antigen presentation. by Salio, M, Ghadbane, H, Dushek, O, Shepherd, D, Cypen, J, Gileadi, U, Aichinger, M, Napolitani, G, Qi, X, Van Der Merwe, P, Wojno, J, Veerapen, N, Cox, L, Besra, G, Yuan, W, Cresswell, P, Cerundolo, V