“…The former is conceived as a translocon formed by interactions of T3 translocators with each other and with PM constituents (B€ uttner, 2016; Figure 6I), either lipids (B€ uttner et al, 2002;Haapalainen et al, 2011;Lee et al, 2001) or proteins (Goure et al, 2004;Li et al, 2015Oh and Beer, 2007). Known T3 translocators include one hydrophilic protein (Ji and Dong, 2015a), such as Hpa1 of xanthomonads, and two hydrophobic proteins (B€ uttner, 2016;Ji and Dong, 2015a), such as HrpF (B€ uttner et al, 2002) and XopN (Mo et al, 2020) of xanthomonads. In the model, recognition of the hydrophilic translocator by a PM constituent is the first step towards translocon assembly (Goure et al, 2004;Mueller et al, 2008).…”