PUF60 (Poly (U) -binding-splicing Factor PUF60, 60kD Poly (U) -binding-splicing Factor, FUSE-binding Protein-Interacting Repressor, FBP-Interacting Repressor, Ro-binding Protein 1, RoBP1, Siah-binding Protein 1, Siah-BP1, FIR, ROBPI, SIAHBP1) discontinued