RNA pull-down assay using 4 pairs of m6A methylated or unmethylated single-stranded RNAs carrying part of the 3′-UTR sequence of IGFBP2 (~20 bp in length) as baits, followed by mass spectrometry analysis. Each pair of RNA baits contained one of the 4 putative m6A consensus motifs in the 3′-UTR of IGFBP2