Cu-Zn SOD expression.

<p>a-e, lacrimal gland; f-j, submandibular gland. Scale bars represent 100 μm (magnification ×400). In the negative control, no brown precipitation was observed, representing no positive response. In the lacrimal gland, positive staining of Cu-Zn SOD mainly occurred on the basolateral side of the acinar cells, while in the submandibular gland, strong staining was found in the GCT and striated ducts.