PHGDH and neoplasm: We previously demonstrated that PHGDH and PSPH catalyze the conversion of 3- phosphoglycerate to serine, leading us to assess Phgdh and Psph mRNA and protein levels in LK, B lymphocytes, plasma cells, T lymphocytes, erythroid cells, and BMSCs isolated from the BM of tumor-bearing 5TGM1 mice (Fig. 6a).