Metabolite quantification was performed using isotope-labeled liquid chromatography-tandem mass spectrometry (LC-MS/MS) in a panel of isogenic breast cancer cell lines, derived from MDA-MB-231, a high-MEMO1 cell line originating from a TNBC tumor, alongside MEMO1-knockdown (M67-2) and MEMO1-knockout (M67-9). This evidence concerns the gene MEMO1 and neoplasm.