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Immunolocalization of Galectin-3 in disc tissue of various age groups (autopsy group). a Fetal nucleus pulposus, showing typical positive labeling of notochordal cells (28th week, disc level L3/4) (×400). b Young adult nucleus pulposus tissue (25 years, disc level L3/4), showing numerous positive cells comparable to the cytokeratin pattern (×200)
