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Northern-blot analysis of transcripts isolated from the hNp28 cells. Lanes 1 and 2 are the ethidium bromide-stained gel before transfer. Lanes 3 and 4 are the same lanes as lanes 1 and 2 after transfer to Genescreen Plus and hybridization with radiolabeled UMPSase probe. Lanes 1 and 3 are from the hNp28 cells without FOA preculture. Lanes 2 and 4 are from the hNp28 cells with preculture on 120 μm FOA.
