To determine whether lncRNA PTTG3P interacts with proteins to play an important role in NSCLC development and progress, we performed an RNA pull-down assay followed by a proteomic analysis of the PTTG3P-associated protein complex in A549 cells (Fig. 4B, left panel), and protein identity was revealed by mass spectrometry. Here, PTTG3P is linked to non-small cell lung carcinoma.