TNAP deficiency increases osteoblastic and adipocytic differentiation in Alpl−/− bone marrow stromal cells (BMSCs) as assessed by gene expression. The osteoblast genes, Bglap (A), Ibsp (B), Col1a1 (C), and Sp7 (D) significantly increased in the Alpl−/− compared to Alpl+/+ BMSCs, when cultured in non-differentiation media (no tx) or osteoblast differentiation media containing ascorbate (Asc) for 6 days. The adipocyte genes, Adipsin (E), Adipoq (F), Fabp4 (G), and Pparg (H) significantly increased in the Alpl−/− compared to Alpl+/+ BMSCs, when cultured in adipocyte induction then maintenance media (AdI/M) for 6 days total. Passage 2 cells were used. n = 3 per genotype. * p < 0.05, statistical significance between genotypes.