PSBR (photosystem II subunit R). Identical to Photosystem II 10 kDa polypeptide, chloroplast precursor (PSBR) [Arabidopsis Thaliana] (GB:P27202); similar to Photosystem II 10 kDa polypeptide, chloroplast precursor (GB:P49108); contains InterPro domain Photosystem II protein PsbR; (InterPro:IPR006814)