CD276 and small cell lung carcinoma: To confirm surface protein expression of CD276, a panel of SCLC cell lines, SHP-77 (SCLC-A), H446 (SCLC-N), H196 (SCLC-Y), and DMS114 (SCLC-P), was analysed by flow cytometry, verifying high CD276-expression at protein level compared to Isotype control (Fig. 1C).