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Figure 1
(a) Reaction catalyzed by PurL. (b) Model of the proposed states involved in catalytic coupling in PurL; the glutaminase domain is shown in pink, the N-­terminal domain in green, the FGAM synthetase domain in light purple, the auxiliary ADP-binding site in white, the FGAR-binding site in cyan and the ATP-binding site in light pink. A black line represents the path followed by ammonia. The presence of the glutamyl thioester intermediate is shown as a blue sphere. The yellow pentagon indicates an empty amidotransferase site.

Journal logoBIOLOGICAL
CRYSTALLOGRAPHY
ISSN: 1399-0047
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