OCLN and breast cancer: Furthermore, the levels of TAZ and Occludin proteins were markedly higher in SAS-δ than those in p-SAS (there was no significant increase in YAP level), but their levels decreased upon addition of TGF-β1 (Fig. 4D, lanes 1–4; G,H,J, n = 3 or 1), consistent with a previous report on EMT in mammary gland and breast cancer cell lines23.