Fig. 4. Low temperature fluorescence of PSI-trimer in SMALPs and DDM. (A) Bands of PSI extracted by SMA 1440 and DDM in sucrose gradient centrifugation. Arrows point to discernable bands 1–4 and are designated as follows: 1 – liberated carotenoids, 2 – free chlorophyll, 3 – trimeric PSI and 4 – larger thylakoid membrane fragments or supercomplexes (absent in DDM preparation). (B) Low temperature fluorescence spectrum of band 3 (trimeric PSI) isolated from sucrose gradient for PSI-DDM (blue) and PSI-SMALP (green).
