KLK6 and colon adenocarcinoma: Table 1 shows the immunoreactivity scores of KLK6 for each tumor in relation with age, gender, tumor stage, histological type, and differentiation grade. It is worth noting that the RT-PCR data agreed with the immunohistochemical data showing a lack of expression of KLK6 in normal tissue vs. its upregulated expression in the colonic adenocarcinoma tissues (Figure 8).