LINC00261 and adenocarcinoma: Our results showed a dramatic upregulation of 9030622O22‐Rik in OPT7714 cells (NEPC) by 120‐fold compared with T23 cells (adenocarcinoma; Fig. S2A); and in OPT7714, the transcript was equally abundant in the cytoplasmic and nuclear compartments (Fig. S2B) This suggests that both expression and cellular localization of LINC00261 are conserved between human and murine NEPC cells.