TLR4 and necrotizing enterocolitis: Figure 6G shows the molecular weight of antibodies. The results showed that TLR4 (Figure 6H) and NF-κB (Figure 6I) expression in the NEC group was higher than that in the control. However, the expression of these proteins in the NEC group with the supplementation of exogenous AI-2 was lower than that in the NEC group (P<0.05).