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Figure 6.
Figure 6. Stereoview of a local ackbone superimposition in the turn regio (Cvs44 to Cys49) between the two
P-strands of fingr 2 of SWIS; as in Fig. 3,45 structures are shown. Atoms Nj: NH, C'', e and 0' re shown for all residues,
tog&her with the zinc ions and he non-hydrogen side-chain atoms of Cys44, Pro47 and Cys49. The conformation is
clearly that of tpe II p-turn, characterized by the hydrogen bond between His46 C = 0 and Cys49 ?u'H (indicated hy
the broken line) and by the relative orientation of the Pro47-Gly48 peptide bond.
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