Swiprosin-1/EFhd2 controls B cell receptor signaling through the assembly of the B cell receptor, Syk, and phospholipase C gamma2 in membrane rafts. by Kroczek, C, Lang, C, Brachs, S, Grohmann, M, Dütting, S, Schweizer, A, Nitschke, L, Feller, S, Jäck, H, Mielenz, D