RAP1A and breast cancer: Model 2 included four candidate predictors specific for breast cancer in this study: Ras-related protein Rap-1A (RAP1A, LVVLGSGGVGK), Integrin alpha-IIb (ITGA2B, VYLFLQPR), FLNA (ANLPQSFQVDTSK), and Talin-1 (TLN1, LAQAAQSSVATITR).