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Complement component 5
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<p>Complement component 5 is a <a href="/facts/Protein/Jxmagu3E">protein</a> that in humans is encoded by the <i>C5</i> <a href="/facts/Gene/e1swwPY6">gene</a>. </p><p>Complement component 5 is involved in the <a href="/facts/Complement_system/vRSrQDUv">complement system</a>. It is cleaved into <a href="/facts/Complement_component_5a/lFo1MSKN">C5a</a> and C5b: </p> <ul><li><a href="/facts/Complement_component_5a/lFo1MSKN">C5a</a> plays an important role in <a href="/facts/Chemotaxis/hYPRdPTk">chemotaxis</a>.</li> <li>C5b forms the first part of the <a href="/facts/Complement_membrane_attack_complex/yqyLrl4S">complement membrane attack complex</a>.</li></ul> <p>Deficiency is thought to cause <a href="/facts/Leiner%27s_disease/oAmRhyMz">Leiner's disease</a>. </p>