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Detection by RT-PCR of VDR in four cases of B cell precursors ALL: lanes 1–4. Blast cells were tested at diagnosis. RT-PCR products of β2mRNA are shown in lanes 5–8. Lane 9 shows molecular weight φX174/HAE III marker. The different genes studied and the size of the amplified fragments are labelled on the left and right sides of the panel, respectively.
