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(A) 3D image of TMPS2 with the position of the catalytic triad (green) in the serine peptidase domain shown. The two six-stranded β-barrels (yellow) are positioned either side of the catalytic triad. (B) Serine peptidase active site showing the catalytic triad (green), the amino acids that form the S1 pocket (light pink) and the two disulfides Cys281-Cys297 and Cys437-Cys465 (magenta).
