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Cross-section through the active-site gorge of TcAChE in the MB/TcAChE complex. The MB molecule is seen stacked against Trp 279 in the peripheral anionic site (PAS). Also shown are Trp 84, in the catalytic anionic subsite of the active site (CAS), and the active-site serine, Ser 200. The entrance to the gorge is depicted at the top. The crystal structure of the MB/TcAChE complex has been deposited in the Protein Data Bank with access code 2W9I.
