Deduced amino acid sequences of zinc-finger domains of the tobacco NtSTOP1 protein. Zinc-finger domains (predicted in Arabidopsis by Englbrecht et al. [2004]) were compared among AtSTOP1 (Arabidopsis), ART1 (rice STOP1 ortholog), PgSTOP1 (black poplar), LjSTOP1 (L. japonicus), CsSTOP1 (tea), and PpSTOP1 (P. patens). Strictly conserved amino acids are highlighted in black, and residues belonging to conserved amino acid groups are highlighted in gray. Asterisks indicate Cys and His of C2H2 motifs.