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. Author manuscript; available in PMC: 2013 Jul 5.
Published in final edited form as: Arch Biochem Biophys. 2012 Feb 2;519(2):154–166. doi: 10.1016/j.abb.2012.01.016

Figure 1.

Figure 1

Figure 1

(A) Equations 1 and 2, the α- and β-reactions, respectively, catalyzed by tryptophan synthase [2]

(B) Organic chemistry of Stages I and II of the β-reaction. The α-aminoacrylate intermediate, E(A–A), is formed in Stage I. Indole formed in the α-reaction reacts with E(A–A) in Stage II to give L-tryptophan.