Structure of the PFP1 protein. AT, AT hook (amino acids RPGRP); Epc-N, Epc-N domain interrupted by PZPM domain; PHD (C4HC3); Zn knuckle (C2H2); PHD-like domain (C5HC2H); I, IIa, and IIb, domains I, IIa, and IIb, respectively; PEST, putative destabilizing motifs; NLS, putative nuclear localization signal.