G3BP1 and metastatic neoplasm: Both 4T1-luc/G3BP1(−)-1 and 4T1-luc/G3BP1(−)-2 cells and a mixture of 4T1-luc/G3BP1(−)-1/2 cells were implanted into the mammary fat pad of mice (BALB/c) to examine their ability to form metastatic tumors.