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H2O2 exposure induces matriptase activation in HaCaT cells. HaCaT cells were exposed to increasing concentrations of H2O2 for 6 h (A) or to 500 μM H2O2 for the indicated times (B). Cell lysates were prepared and analyzed by immunoblot analyses for total matriptase (total MTP), activated matriptase (activated MTP), and HAI-1.
