PSBO1 Manganese-stabilizing protein 1 332 OEC 33 kDa subunit 33 kDa subunit of oxygen evolving system of photosystem II At5g66570 PSBO1_ARATH Stabilizes the manganese cluster which is the primary site of water splitting. 33 kDa thylakoid membrane protein Oxygen-evolving enhancer protein 1-1, chloroplastic K1F13.25 MAASLQSTATFLQSAKIATAPSRGSSHLRSTQAVGKSFGLETSSARLTCSFQSDFKDFTGKCSDAVKIAGFALATSALVVSGASAEGAPKRLTYDEIQSKTYMEVKGTGTANQCPTIDGGSETFSFKPGKYAGKKFCFEPTSFTVKADSVSKNAPPEFQNTKLMTRLTYTLDEIEGPFEVASDGSVNFKEEDGIDYAAVTVQLPGGERVPFLFTVKQLDASGKPDSFTGKFLVPSYRGSSFLDPKGRGGSTGYDNAVALPAGGRGDEEELVKENVKNTAASVGEITLKVTKSKPETGEVIGVFESLQPSDTDLGAKVPKDVKIQGVWYGQLE PSBO