ACD1 (ACCELERATED CELL DEATH 1). Identical to Pheophorbide a oxygenase, chloroplast precursor (PAO) [Arabidopsis Thaliana] (GB:Q9FYC2;GB:O04422); similar to ACD1-LIKE, electron carrier [Arabidopsis thaliana] (TAIR:AT4G25650.1); similar to pheophorbide A oxygenase 2 [Nicotiana tabacum] (GB:ABY19385.1); similar to chloroplast pheophorbide a oxygenase PaO1 [Brassica napus] (GB:ABD60317.1); similar to chloroplast pheophorbide a oxygenase PaO2 [Brassica napus] (GB:ABD60316.1); contains InterPro domain Rieske [2Fe-2S] region; (InterPro:IPR005806); contains InterPro domain Pheophorbide a oxygenase (InterPro:IPR013626)