Tmprss6^−/−Hjv^−/− and Tmprss6^+/+Hjv^−/− mice show similar Bmp6 and Id1 levels. (A) Hepatic Bmp6 mRNA expression relative to β-actin mRNA expression in Tmprss6^+/+Hjv^+/+, Tmprss6^−/−Hjv^+/+, Tmprss6^+/+Hjv^−/−, and Tmprss6^−/−Hjv^−/− mice. (B) Hepatic Id1 mRNA expression relative to β-actin mRNA expression in Tmprss6^+/+Hjv^+/+, Tmprss6^−/−Hjv^+/+, Tmprss6^+/+Hjv^−/−, and Tmprss6^−/−Hjv^−/− mice. Mean values from analysis of 8-week-old female mice are graphed. For each parameter, 4 female mice per genotype were analyzed. Error bars represent SEM. ‡P < .05 compared with Tmprss6^+/+Hjv^+/+; *P value not significant compared with Tmprss6^+/+Hjv^−/−.