Electronic Resource
Oxford, UK
:
Blackwell Publishing Ltd
FEMS microbiology letters
43 (1987), S. 0
ISSN:
1574-6968
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Biology
Notes:
Peptostreptococcus productus strain Marburg is able to grow on CO as the sole energy source and converts this substrate to acetate and CO2 according to the following equation: 4 CO + 2 H2O → 1 acetate−+ 1 H++ 2 CO2 In cell suspensions of the organism the apparent Km value for CO conversion to acetate was about 270 μM (∼ 25% in the gas phase at 140 kPa). Cells incubated in the presence of 14CO and unlabelled CO2 incorporated CO specifically into the carboxyl group of acetate like other acetogenic bacteria tested. However, in contrast to experiments performed with other acetogens, 100% of the carboxyl group formed was derived from CO rather than from CO2 indicating that ‘free’ CO rather than a bound carbonyl formed from CO2 may be the precursor for the synthesis of the carboxyl group of acetate in this organism.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1574-6968.1987.tb02174.x
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