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mASC differentiation. mASC isolated after 1 week of arsenic exposure were stained for the A, adipogenic marker fatty acid-binding protein 4 (FABP4) or B, osteogenic marker osteopontin (OPN) prior to differentiation or following differentiation. 4′,6-Diamidino-2-Phenylindole, Dihydrochloride (DAPI) was used as a nuclear stain. Pictures are used to show presence of markers after differentiation and not as a quantitative measure for level of differentiation.
