Distinct conformations of Ly49 natural killer cell receptors mediate MHC class I recognition in trans and cis.
Back J, Malchiodi EL, Cho S, Scarpellino L, Schneider P, Kerzic MC, Mariuzza RA, Held W. Immunity. 2009 Oct 16; 31(4):598-608. Epub 2009 Oct 8.