<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>Plant cell inclusion bodies that contain the photosynthetic pigment chlorophyll, which is associated with the membrane of THYLAKOIDS. Chloroplasts occur in cells of leaves and young stems of higher plants.</n0:def-definition><n0:def-source>MSH2001</n0:def-source></n0:ComplexDefinition>
<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>Photosynthetic organelle containing chlorophyll, the photosynthetic pigment, in cells of leaves and young stems of higher plants. Lens-shaped and rather variable in size but approximately 5 m long. Surrounded by a double membrane and contains circular DNA (though not enough to code for all proteins in the chloroplast). Like the mitochondrion, it is semi-autonomous. It resembles a cyanobacterium from which, on the endosymbiont hypothesis, it might be derived. Chlorophyll is associated with the membrane of vesicles (thylakoids) that are stacked to form grana.</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>