2.6.1.85 ? x * 71274, calculated, x * 71251, MALDI-TOF, His-tagged recombinant protein 724464 2.6.1.85 ? x * 80600, calculated 738864 2.6.1.85 dimer heterodimer of chorismate aminating subunit and glutamine amidotransferase subunit. Mass of glutamine amidotransferase subunit is 50969 Da, as determined by electrospray mass spectrometry 661938 2.6.1.85 heterodimer PabA-PabB 702371 2.6.1.85 monomer - 644249 2.6.1.85 monomer PabB in solution 724331