2.04:_Phospholipids

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<p class="lt-bio-3782" style="background-color: unset;">Phospholipids are fat derivatives in which one fatty acid has been replaced by a phosphate group and one of several nitrogen-containing molecules.</p>

<p class="mt-align-center lt-bio-3782" style="background-color: unset;"><em><strong>Example 2.4.1</strong>: Phosphatidyl ethanolamine (also known as cephalin)</em></p>

<p class="lt-bio-3782" style="background-color: unset;">The hydrocarbon chains are <strong>hydrophobic </strong>(as in all fats). However, the charges on the phosphate and amino groups (in red) make that portion of the molecule <strong>hydrophilic</strong>. The result is an <strong>amphiphilic</strong> molecule.</p>

<p class="lt-bio-3782" style="background-color: unset;">Phospholipids like phosphatidyl ethanolamine are major constituents of <strong>cell membranes</strong>. These molecules form a <strong>phospholipid bilayer</strong> with their hydrophilic (polar) heads facing their aqueous surroundings (e.g., the cytosol) and their hydrophobic tails facing each other.</p>

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<hr class="autoattribution-divider" /><div class="autoattribution"><p>This page titled <a target="_blank" class="internal mt-self-link" href="/Sandboxes/johnnyphung/biology/02:_The_Molecules_of_Life/2.04:_Phospholipids">2.4: Phospholipids</a> is shared under a <a rel="nofollow" href="https://creativecommons.org/licenses/by/3.0" target="_blank">CC BY  3.0</a>  license and was authored, remixed, and/or curated by <a rel="nofollow" target="_blank" href="http://www.biology-pages.info/">John W. Kimball</a> via <a rel="nofollow" href="https://www.biology-pages.info/" target="_blank">source content</a> that was edited to the style and standards of the LibreTexts platform.</p></div>

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