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Structural detail of residues at the hairpin tip of a Tsr dimer. The white backbone trace depicts the subunit that would be on the outside in the trimer arrangement; the gray trace depicts the subunit that would be at the trimer interface. Black, R388; white, G390 or G393; light gray, A389; gray, E391; dark gray, Q392. (A) Front view. (B) Side view. (C) End-on view.
