Fig 3. Matriptase is expressed at high levels in human skin, but is largely present in the zymogen form.

Sections of human skin were immunostained with the matriptase mAb M24 (A and B, Total Matriptase) and the activated matriptase mAb M69 (C and D, Activated Matriptase). Representative examples of the staining observed are presented. Scale bar: ~100 μm. n>20.