Microbial Metabolism
The major route for incorporation of ammonia (NH4+) into organic compounds is via

oxidation of pyruvate
atmospheric nitrogen fixation
reduction of pyruvate or alpha-ketoglutarate by enzymes
all of these

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Microbial Metabolism
ATPase

extrudes protons from the cell coupled to the hydrolysis of ATP to ADP
carries out each of the reactions indicated in (a) and (b)
synthesizes ATP, coupled to transfer of extracellular protons into the cell
is the enzyme that incorporates ATP into messenger RNA

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