Poly(ADP-ribosyl) ation(PARylation), catalyzed by poly(ADP-ribose) polymerases(PARPs), is an important posttranslational modification of proteins. They play important roles in DNA repair, remodeling of chromatin structure, gene transcription, cell cycle and cell death regulation. PARPs were well studied in animals but less understood in plants. The c DNA fragment of PARP2 was obtained by PCR from Arabidopsis and cloned into prokaryotic expression vector. The recombinant protein TRX-PARP2 was expressed and p...