00562naa a2200193 a 450000100080000000500110000800800410001910000140006024501140007426000090018865000280019765000120022565000100023765000160024770000180026370000180028170000190029977300500031816196511995-06-27       1993    bl ---       0--  u    #d1 aZHANG, Y.  aPosttranslational regulation of nitrogenase activity by anaerobiosis and ammonium in Azospirillum brasilense.  c1993  aAzospirillum brasilense  aAmônia  aCampo  aNitrogenase1 aBURRIS, R. H.1 aLUDDEN, P. W.1 aROBERTS, G. P.  tJ. Bacteriol.gv.175, n.21, p.6781-688, 1993.