Fig. 1.
Morphologic and cytochemical changes in RA-resistant APL cells by 1,25(OH)2D3. UF-1 cells were cultured with either 10−7 mol/L 1,25(OH)2D3 (B and D) or culture media alone (A and C) for 4 days, and cytospin slides were prepared and stained with either Giemsa (A and B) or naphthol AS-D chloroacetate esterase (C and D). Original magnification ×1,000.