Clustering of peptidoglycan recognition protein-SA is required for sensing lysine-type peptidoglycan in insects.
Park JW, Kim CH, Kim JH, Je BR, Roh KB, Kim SJ, Lee HH, Ryu JH, Lim JH, Oh BH, et al. Proc Natl Acad Sci U S A. 2007 Apr 17; 104(16):6602-7. Epub 2007 Apr 4.