title: Activating factor for the iron protein of nitrogenase from Rhodospirillum rubrum.
abstract: As isolated from Rhodospirillum rubrum, the iron protein of nitrogenase has little or no activity. It can be activated by incubating it with a trypsin-sensitive, oxygen-labile component (activating factor) plus adenosine triphosphate and a divalent metal ion. After activation, the iron protein retains its nitrogenase activity when the activating factor is removed.
mesh_terms: D000255:Adenosine Triphosphate / Q000494:pharmacology; D004789:Enzyme Activation; D007501:Iron / Q000378:metabolism; D008274:Magnesium / Q000494:pharmacology; D008345:Manganese / Q000494:pharmacology; D008667:Metalloproteins / Q000378:metabolism*; D009591:Nitrogenase / Q000378:metabolism*; D012247:Rhodospirillum rubrum / Q000201:enzymology*
chemical_list: D008667:Metalloproteins; D008345:Manganese; D000255:Adenosine Triphosphate; D007501:Iron; D009591:Nitrogenase; D008274:Magnesium