CAVIN1 and Familial prostate cancer: To determine if CAVIN1 directly influences hnRNPK localisation or acts by neutralizing non‐caveolar CAV1, we ectopically expressed CAV1 in two cell lines that naturally lack CAV1 and CAVIN1, namely the androgen‐sensitive prostate cancer cell line LNCaP, and human embryonic kidney HEK293 cells.