- Human inhibitory receptors Ig-like transcript 2 (ILT2) and ILT4 compete with CD8 for MHC class I binding and bind preferentially to HLA-G. Shiroishi, M., Tsumoto, K., Amano, K., Shirakihara, Y., Colonna, M., Braud, V.M., Allan, D.S., Makadzange, A., Rowland-Jones, S., Willcox, B., Jones, E.Y., van der Merwe, P.A., Kumagai, I., Maenaka, K. Proc. Natl. Acad. Sci. U.S.A. (2003)