eCLIP experiments were performed as previously described using a IGf2BP1(MBL, #RN007P). see Eric L Van Nostrand,2016 DOI https://doi.org/10.1038/nmeth.3810 eCLIP experiments were performed as previously described using a IGf2BP1(MBL, #RN007P). see Eric L Van Nostrand,2016 DOI https://doi.org/10.1038/nmeth.3810