The lipid bands centered at ∼1605, ∼1260, ∼1056, and ∼970 cm−1 are unique for TNBC-derived EVs, while HER2(+) breast cancer cell-derived EVs shows unique protein bands at ∼1634, ∼1198, ∼1101, and ∼1014 cm−1 (Figure 5C2). This evidence concerns the gene ERBB2 and breast cancer.