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High magnification of colon mucosa showing expression of syndecan 1 (SDC1) in plasma cells. A weaker expression is also seen in the cytoplasm of glandular cells.

CD138 (SDC1) - General plasma cell marker

CD-markers (Cluster of Differentiation) are antibodies that recognize cell surface antigens and antibodies detecting specific CD antigens are used in immunohistochemistry, mainly to distinguish different types of immune cells. The SDC1 gene encodes for the syndecan 1 protein (CD138 molecule), a transmembrane heparan sulfate proteoglycan and a member of the scavenger receptor family. The CD68 molecule is primarily localized in lysosomes and endosomes, with a smaller fraction expressed on the cell surface. CD68 antibodies are used as markers of cells from the monocytic lineage (histiocytes, macrophages) in diagnostics of lymphoma/leukemia and to characterize various inflammatory cell infiltrates.

Show SDC1 in the protein atlas.

Normal tissue - Protein expression

Colon
Lymph node
Tonsil