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CL motif analysis of PUM2 eCLIP input data. Logo representation of the four top scoring motifs among the first 5000 PureCLIP crosslink sites called on the input dataset. Motifs were detected with DREME and a 10-bp window around the crosslink sites. As previously reported [5], polypyrimidine-rich motifs are overrepresented. CL motifs of the other datasets are shown in Additional file 1: Figure S13
