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PD-L1 is overexpressed in Tgfb1−/− liver. A, Expression levels of PD-L1 mRNA were mined from microarray data from liver RNA isolated from mice of the indicated genotypes (n = 3 per group). B, Liver NPC were isolated from mice of the indicated genotypes and stained for CD11b and PD-L1. Similar data were acquired from three independent experiments.
