PTPN14 and breast carcinoma: In contrast to the effect of PTPN14 depletion, PTPN14‐overexpressing (PTPN14‐OE) breast cancer cells displayed diminished proliferation when cultured in monolayers, as evidenced by the results of the CCK‐8 and colony formation assays (Figure 3B; Figure S3B,D, Supporting Information).