Infection of Col0 bbc plants; missing the bak1–5, bkk-1, and cerk1 immune receptor genes [27], with WT Pto and all five hrcN mutants led to strong infection phenotypes, in contrast to the ΔhrcC, ΔhrcN and water controls (Figs 3C, S3A-S3B). Here, BAK1 is linked to infection.