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Definition: a type I transmembrane protein present on thymocytes, T cells, granulocytes, monocytes, natural killer cells, platelets, brain, activated B cells, plasma cells, and hemopoietic stem cells that serves as a ligand for CD54 and facilitates cell-cell adhesion; expressed on some myelomas and lymphomas.

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.