Fig. 6. Hcps bound to macrophages and inhibited phagocytosis.
a The endotoxin-free rHcp1 and rHcp2B could significantly inhibit phagocytosis of RAW 264.7 cells. The functions of T6SS1 and T6SS2 were deficient in ΔclpV1ΔclpV2, which could avoid the effects of other T6SS effectors. Error bars represent the standard deviations from three independent experiments, **p < 0.01. b The Vs2 region played a key role in rHcp1 and rHcp2B binding to macrophages. Endotoxin-free rHcps (25 μg) was co-incubated with RAW 264.7 cells for 4 h and washed five times with MEM