- AP-1 differentially expressed proteins Krp1 and fibronectin cooperatively enhance Rho-ROCK-independent mesenchymal invasion by altering the function, localization, and activity of nondifferentially expressed proteins. Spence, H.J., McGarry, L., Chew, C.S., Carragher, N.O., Scott-Carragher, L.A., Yuan, Z., Croft, D.R., Olson, M.F., Frame, M., Ozanne, B.W. Mol. Cell. Biol. (2006)