PGR3 (PROTON GRADIENT REGULATION 3). similar to pentatricopeptide (PPR) repeat-containing protein [Arabidopsis thaliana] (TAIR:AT1G62910.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO44353.1); similar to pentatricopeptide, putative, expressed [Oryza sativa (japonica cultivar-group)] (GB:ABB47632.1); similar to hypothetical protein OsI_032490 [Oryza sativa (indica cultivar-group)] (GB:EAY78531.1); contains InterPro domain Pentatricopeptide repeat (InterPro:IPR002885)