Figure 1

Figure 1 SDS-PAGE of fractions derived from sucrose density centrifugation. Lane 1, molecular markers; lane 2,-PSI trimers; lane 3, CP43'; lane 4, CP43'-PSI complex; and lane 5, western blot using antibody to CP43'.-PSI RC corresponds to the PsaA and PsaB reaction centre (RC) proteins of-PSI. CP43' is the product of the isiA gene predicted to have Mr 37K but resolved at approximately 30K by SDS-PAGE.

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