This study reveals that except Rab7a, five Rab proteins, Rab8a, Rab11b, Rab27a, Rab35, and Rab37, were highly expressed in the purified AP of lung cancer cells (CL1‐5‐Q89L) with a high secretory tendency (Q) (Figure 3, column 4 vs. column 3). Here, RAB8A is linked to lung cancer.