porin.html

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<!-- Page Title: Porins -->
<h2>Introduction</h2>
<p>
    This script shows the structure of a porin. Porins form water channels in
    the outer membrane of bacteria. (Based on 1prn.pdb, Kreusch &amp; Schulz
    (1994) J.Mol.Biol. <strong>243</strong>: 891-905)
</p>
<br>

<h2>&beta; Barrel</h2>
<p>
    Porins form a 16 or 18-stranded beta barrel in the membrane with a
    water-filled core.
</p>
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<br>

<h2>Structure</h2>
<p>
    The basic structure is an amphipathic beta sheet with the
    <span style="color:green;">hydrophobic side chains</span> pointing out into
    the membrane.
</p>
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<br>

<h2>Porins 3</h2>
<p>
    The <span style="color:red;">hydrophilic side chains</span> point inward to
    form the water-filled channel.
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