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Figure 2<br />

A schematic diagram of the putative hydrogen bonds formed between oligopeptide inhibitors and the fungal aspartic<br />

proteinase endothiapepsin. The latter enzyme provided a useful model system for structural studies of interactions formed <strong>by</strong> renin<br />

inhibitors with the active site cleft of aspartic proteinases prior to the determination of the human renin structure. The inhibitor is shown<br />

horizontally with enzyme groups above and below. Intervening hydrogen bonds are indicated <strong>by</strong> dashed lines. Note the extensive<br />

hydrogen-bond interactions made between the transition state analogs and the catalytic apparatus of the enzyme.<br />

http://legacy.netlibrary.com/nlreader/nlReader.dll?bookid=12640&filename=Page_325.html [4/5/2004 5:24:51 PM]<br />

Page 325

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