A 54-kDa fragment of the Poly(A)-specific ribonuclease is an oligomeric, processive, and cap-interacting Poly(A)-specific 3′ exonuclease - Martinez, J; Ren, Y-G; Thuresson, A-C; Hellman, U; Åström, J; Virtanen, A (J Biol Chem, 2000)