Electronic Resource
Oxford, UK
:
Blackwell Publishing Ltd
FEMS microbiology letters
81 (1991), S. 0
ISSN:
1574-6968
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Biology
Notes:
Abstract: A novel, apparently acid-stable cytochrome has been purified from Leptospirillum ferrooxidans in which it probably functions in the ‘downhill’ transfer of electrons from ferrous iron. It appeared to comprise a single polypeptide of apparent Mr 17.9 kDa as determined by SDS-PAGE. Non-denaturing PAGE showed this to be the approximate size of the native protein. The oxidized cytochrome showed a broad absorption maximum at 422 nm and was readily reduced with dithionite or ferrous iron to give a form with absorption maxima at 440 and 579 nm. A mid-point potential of +680 mV at pH 3.5 was determined. Iron and zinc were found at concentrations approaching one atom of each per cytochrome molecule.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1574-6968.1991.tb04718.x
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