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Colocalization of activated matriptase with pepsinogen 2 in the secretory granules of gastric chief cells. Paraffin-embedded human stomach sections were stained for activated matriptase (A) and pepsinogen 2 (B) using the mAb M69 and the sheep polyclonal antibody (ab9013), respectively. C: merged image of A and B to show the colocalization between the activated matriptase and pepsinogen 2. Bar = 30 μm.
