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. 2012 Oct 17;103(8):1790–1801. doi: 10.1016/j.bpj.2012.09.009

Figure 9.

Figure 9

Substrate-bound active site for TEM-1/BZP (A) and PSE-4/CBC (B). Heavy substrate and catalytic side-chain atoms are shown as sticks and CPK-colored, with cyan (substrate) or pink (residues) carbons. Protein elements forming the catalytic site are colored: blue for S5 strand (K/R234); orange for H2 (S70, K73); green for the SDN loop (S130); red for the Ω loop (E166). H-bonds between catalytic residues and substrate are shown as white lines, as is the intrasubstrate H-bond in CBC. Stereo figure: left pairs are wall-eyed; right pairs cross-eyed.