GUN4 (Genomes uncoupled 4). Identical to Tetrapyrrole-binding protein, chloroplast precursor (GUN4) [Arabidopsis Thaliana] (GB:Q9LX31;GB:Q8VZR4); similar to unnamed protein product [Vitis vinifera] (GB:CAO64790.1); similar to hypothetical protein [Vitis vinifera] (GB:CAN76796.1); contains InterPro domain GUN4-like (InterPro:IPR008629)