Fig. 1

Validation of protein interactors. a Secondary structure model of the intronic sequence. hnRNP A1, hnRNP U and HuR binding sites predicted by RBPmap are color coded. b Fold enrichment of the LMP2 pre-mRNA following RIPs carried out with antibodies against hnRNP A1, hnRNP U, hnRNP L, HuR, PSF and NONO. c Fold enrichment of pre-mRNA (junction spanning primers) and intron (internal primers) following RIPs with anti-actin antibody. Data represents the average (with standard deviation) of independent experiments all normalized to control RIP with IgG. All RIPs (except for RIPs for NONO and hnRNP L) were carried out as either 2 or 3 independent experiments. All primer sequences used for the experiments are included in Additional file 6: Table S4