... Y. & Murata, N. (1988) Partial degradation of the extrinsic 23-kDa protein of the photosystem II complex of spinach. Biochim. Biophys. Acta 936, 465–474.22. Kuwabara, T., Murata, T., Miyao, ... Florencio Pazos2,*, Damien Devos2,†, Alfonso Valencia2and Javier De Las Rivas11Instituto de Recursos Naturales y Agrobiologı´ a (CSIC), Cordel de Merinas, Salamanca, Spain;2Centro Nacional ... chromatography. The chromatographic steps werecarried out in an A ¨ktapurifier-100 apparatus (AmershamPharmacia Biotech UK Limited). The native PsbQ proteinwas first passed through a cation-exchange...