GCNA proteins in higher plants comprise the YABBY family.

YABBY and GCNA proteins possess an IDR, a C2C2 zinc finger, and a characteristic two-helix HMG box (Bowman and Smyth, 1999). Regions are color coded as follows: IDR/'central variable region' (region outlined in green, with IUPred (Dosztányi et al., 2005) predicted disordered residues highlighted in green), C2C2 zinc finger (purple), and two-helix HMG box (pink). Residues that are identical in 70% of the sequences are shaded black; similar residues are shaded gray.