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Type IV in cerebral ganglia containing typical large lysosomes (Lys) with lipofuscin (L). Electron-dense heterochromatin is present in edge of the nucleus. Unidirectional synapses are located nearby containing presynaptic profile with small vesicles (asterisks) and postsynaptic profile (P). Asterisks, presynaptic profiles. Thin arrows show glial tubular lattice clusters. Arrowhead, a desmosome join the processes of adjacent cells. M, mitochondrion; N, nucleus.
