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Figure 3.
Fig. 3. Stereo drawing showing location of the sulfate ion, the two
benzamidine molecules and the calcium ion in the three-dimensional
structure of ST-lIB. C(~ backbone is drawn wit thin lines while side-
chain atoms of the catalytic triad residues (His57, Aspl02, Ser195)
and Asp189 at the base of the specificity pocket, the sulfate ion and
benzamidne molecules are drawn in thick lines. he calcium ion
is indicated by a sphere. ZA246 is in the specficity pocket while
BZA247 is located at the surface of the protein mediating contacts to
a neighbouring molecule.
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