<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>Cell Wall Alteration involves a change in the existing structure or function of the rigid protective structure outside of, and joined to, the plasma membrane of plant cells and most prokaryotic cells that maintains cell shape.</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>