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The structure of LT, STa, STb, uroguanylin, and guanylin. (a), (b) Three-dimensional structure of the LT (PDB accession no. 1LTB). (c) Three-dimensional structure of the STa (PDB accession no. 1ETN). (d) Three-dimensional structure of the STb (PDB accession no. 1EHS). (e) Three-dimensional structure of the uroguanylin (PDB accession no. 1UYA). (f) Three-dimensional structure of the guanylin (PDB accession no. 1GNA). Image created with BioRender software.
