SRO3 (SIMILAR TO RCD ONE 3); NAD+ ADP-ribosyltransferase. similar to SRO2 (SIMILAR TO RCD ONE 2), NAD+ ADP-ribosyltransferase [Arabidopsis thaliana] (TAIR:AT1G23550.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO64333.1); contains InterPro domain Poly(ADP-ribose) polymerase, catalytic region; (InterPro:IPR012317)