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Definition: a type I transmembrane protein present on B cells and T cells, natural killer cells, eosinophils, monocytes, erythroblasts, thymocytes, and myoblasts that facilitates cell-cell adhesion and leukocyte migration and aids in lymphocyte activation; expressed in melanomas.

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