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Analysis of RAR and RXR expression in the NB cell line SK-N-BE2(c). One microgram of total cellular RNA was analyzed by RT-PCR with a nested reaction protocol for RAR or RXR subtypes and isoforms as described in Materials and Methods. (A) Control cell cells; (B) cells treated for 24 h with 10 nM RA. The left lane in each panel contains molecular size markers (φX174 RFDNA/HaeIII fragments [GIBCO]).
