Table 4. Superoxide Production by Cytochromeb6f Complex in Thylakoid Membranes from the Cyanobacterium, M. laminosus; Electron Acceptor, Cytochrome c.
Electron transfer rate, 103 chl a-1 · s-1 | Superoxide production rate 103 chl a-1 · s-1 | Superoxide production rate (% electron transfer rate) | |
---|---|---|---|
Control, no inhibitor | 201 ± 3 (n=3) | 2.6 ± 0.6 (n=4) | 1.3 ± 0.3 |
NQNO, 5 μM | 151 ± 8 (n=3) | 1.5 ± 0.1 (n=3) | 0.9 ± 0.1 |
DBMIB, 2 μM | 11 ± 2 (n=3) | n.d. (n=3) | - |
DBMIB, 5 μM | 0.2 ± 0.4 (n=3) | n.d. (n=3) | - |
n, number of trials; n .d., not determined.