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CAS No. | 91682-96-1 | Cat. No. | BCP25651 |
Name | Stigmatellin | ||
Synonyms | |||
SMILES | CC=C(C)C=CC=CC(C(C)C(C(C)CCC1=C(C(=O)C2=C(O1)C(=C(C=C2OC)OC)O)C)OC)OC | ||
Chemical Name | |||
Formula | C30H42O7 | M. Wt | 514.65 |
Purity | 98% | Storage | Store at 4-8°C |
Description | Stigmatellin, a chromone inhibitor acting at the Q0 center of the bc1 complex, binds to the heme b-566 domain of cytochrome b as well as to the Fe2S2 protein. Its binding induces a shift of the alpha-band of heme b-566 to 568 nm. It does not influence the ligand field of the heme b-562 center. Concomitant with the red shift, stigmatellin gives rise to an alteration of the EPR line shape of the Fe2S2 cluster, namely linewidth narrowing and g value shifts at all 3 principal values. The midpoint redox potential of the Fe2S2 protein is shifted from 290 to 540 mV. |
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