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A three-dimensional image of the spinach photosystem II core complex composed of CP47, D1, D2, cytochromeb-559, andpsbI gene product was reconstructed at 20-Å resolution from the two-dimensional crystals negatively stained with phosphotungstate. Confirming the previous proposal, the crystal had ap22 1 2 1 symmetry. One PSII core complex was measured to be 80 × 80 Å in the membrane...
Two formerly-uncharacterized subunits of 9 kDa and 14 kDa were found in spinach PSI complex. The 9 kDa subunit was released upon removal of antenna chlorophyll complex, whereas the 14 kDa subunit was tightly bound to the core complex. We determined the N-terminal amino acid sequence of the 9 kDa, and an internal sequence of the 14 kDa subunit after protease treatment, since the N-terminus of the latter...
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