To study long transcripts (>1000 nt), we use the fragmentation procedure, which is based on division of protein and RNA sequences into sub-regions. The signal coming from the binding propensities of individual fragments is integrated into a variable called Global Score that predicts the overall interaction ability of a protein-RNA pair. The introduction of Global Score allows the calculation of interactions with long non-coding RNAs, thus extending the general applicability of catRAPID (Bellucci et al. Nat Methods 2011).
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