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Overview
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This antibody reacts with the CD56-antigen, which is expressed in lymphocytes mediating non-MHC restricted cytotoxicity and is present on some neural tissues and tumors. It is expressed on natural killer (NK) Cells and a subpopulation of T lymphocytes. NK cells make up approximately 10-25% of peripheral blood lymphocytes. This protein is a cell adhesion molecule involved in neuron-neuron adhesion, neurite fasciculation, outgrowth of neurites, etc. Expression of neural cell adhesion molecules (N-CAM) provides neurons with a means of attaching to and interacting with other cells and the extracellular matrix. There are describes 6 isoforms produced by alternative splicing of N-CAM mRNA. The three major isoforms are referred to as 180 kD, 140 kD, and 120 kD. Individual isoforms undergo various post-translational modifications, including the addition of polysialic acid residues to embryonic forms. The highly polysialylated forms of N-CAM present in embryos and neonates are lost during maturation and replaced by less-polysialic acid-laden mature forms of N-CAM. The functional significance of alternative forms of N-CAM remain to be fully elucidated.
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- Properties
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Overview