Epithelial/carcinoma cells tend to express HAI-2 at higher levels in relation to matriptase based on the distribution of the log HAI-2/matriptase ratio of between 0 and 1 among majority of these epithelial/carcinoma cells and between 1 and 2 among for some other lines, indicating that the HAI-2:matriptase mRNA ratio varies between 1 and 100. Here, ST14 is linked to carcinoma.