MAPK3 and infection: We have previously shown that after 4 hours infection from the basolateral side N. meningitidis has invaded into HIBCPP cells (Schwerk et al., 2012; Borkowski et al., 2014), and phosphorylation of Erk1/2 and p38 was observed using an MOI of 100 (Herold et al., 2021a).