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Table 3 Effects of L-arginine on vertebrate, plant and bacterial NAGS.

From: Inversion of allosteric effect of arginine on N-acetylglutamate synthase, a molecular marker for evolution of tetrapods

  NAGS Specific Activity (μmoles min-1mg-1)
Organism   + 1 mM Arg
Human 19.293 ± 0.384a 29.285 ± 1.211
Mouse 29.523 ± 1.076 46.541 ± 5.602
African clawed frog 0.438 ± 0.011 0.528 ± 0.004
Western clawed frog 0.098 ± 0.002 0.136 ± 0.005
Zebrafish 10.638 ± 0.090 5.475 ± 0.121
Pufferfish 20.887 ± 0.278 15.898 ± 0.141
X. campestris 111.741 ± 1.669 ndb
M. maris 62.004 ± 3.751 0.572 ± 0.136
Arabidopsis 9.116 ± 0.279 nd
E. coli 5.859 ± 0.220 1.840 ± 0.032
  1. aActivities are averages of three measurements and the associated standard errors.
  2. bNot detectable.