Figure 4: Ly6B.2 staining of mouse liver tissue by immunohistochemistry, 6 hr post intravenous exposure to ENPRA panel of engineered nanomaterials (100 μl-128 μg/ml of NMs). A positive control of LPS (50 μl-100 μg/ml) was also employed. The negative control is representative of animals injected with 100 μl of PBS. A) PBS B) LPS C) NM 110 D) NM 111 E) NM 300 F) NM 400 G) NM 402 H) NRCWE 002.