NOX1 and adenocarcinoma: The Ki (167) database reporting gene expression in the normal colon, adenocarcinoma, and metastatic colon cancer (Fig. 11B) does not show any values for NOX1 or NOX3 expression, but NOX2 expression suggests relatively stable mRNA levels, showing, on average, a 16.9% (SD 60.0) increase in the primary tumor and a 19.0% (SD 74.0) decrease in metastasis (Fig. 11B).