For RNA pull-down assays we followed a protocol provided by Myriam Gorospe (National Institute on Aging) [46]. PCR primer combinations were used to generate templates for in vitro transcription to create biotinylated RNA probes: FL (full length) template = B2P1T7/B2P2as spanning −286 to +3, P1 template = B2P1T7/B2P1as spanning −286 to −126, and P2 template = B2P2T7/B2P2as spanning −125 to +3. Oligonucleotide sequences (T7 promoter sequence is underlined):B2P1T7: 5′-GAATTCAAGCTTAATACGACTCACTATAGGGCATCACAGAGGAAGTAGACG; B2P1as: 5′-GATATCGGATCCACGAGGGGGTGTCTTCAATC; B2P2T7: 5′-GAATTCAAGCTTAATACGACTCACTATAGGGCCAAGAATGCAAAGCACATCC; B2P2as: 5′-GATATCGGATCCCATCCTTCCCAGAGGAAAAGC.
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