Although nitrogen is very abundant in the atmosphere as dinitrogen gas (N 2), it is largely inaccessible in this form to most organisms, making nitrogen a scarce resource and often limiting ...

Although nitrogen gas (N 2) is plentiful, it is largely unavailable to most organisms without a process known as nitrogen fixation, which converts dinitrogen to ammonium—a major inorganic ...

54, No. 4 (Jul., 2009), pp. 1403-1411 (9 pages) This study investigated the bulk nitrogen isotopic composition and fractionation of marine and freshwater cyanobacteria growing at the expense of ...

They consist of two components: an iron (Fe) protein and a molybdenum–iron (MoFe) protein, which must come together and then separate eight times to catalyse the conversion of one dinitrogen ...