An effector-targeted protease contributes to defense against Phytophthora infestans and is under diversifying selection in natural hosts. - Kaschani, F; Shabab, M; Bozkurt, T; Shindo, T; Schornack, S; Gu, C; Ilyas, M; Win, J; Kamoun, S; van der Hoorn, R (Plant physiology, 2010)