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Ribbon secondary structure representation of the global structures of apo (green) and MTT-bound (blue) SAP-L, highlighting the four pullulanase domains, the N and C termini, calcium ions (red spheres), chloride ions (yellow spheres), and bound MTT (red sticks). For simplicity, only the chloride ion present in the binding site of the apo structure (CL4) is labeled. This figure was generated using Pymol version 1.1r1 (www.pymol.org).
