The Immunoglobulin superfamily of cell adhesion molecules is related to the immunoglobulins proteins by structure. The family contains over a 100 members, which include ICAM (intercellular adhesion molecule), NCAM (neural cell adhesion molecule) and NgCAM (neural-glial cell adhesion molecule). Both NCAM and NgCAM are calcium independent adhesion molecules. NCAM, the first CAM to be characterized, is expressed on all neurons from very early in development. It binds homophilically to NCAM on adjacent cells and has a variety of functions during neural development. One of these important functions is to hold developing neurites together during neuron outgrowth and formation of neural connections. The adhesive properties of NCAM are modulated during development and plasticity by the presence of the regulated carbohydrate, polysialic acid (PSA). The post-translational addition of alpha-2,8-linked PSA (NCAM-PSA) appears to contribute to synaptic plasticity during learning and memory formation and to the mechanisms of nerve regeneration.，官网链接：https://www.sigmaaldrich.cn/product/mm/ab5032 默克 科研、开发、生产。 作为生命科学行业的全球领先供应商，我们致力于为科研、生物技术开发和生产，以及制药药物疗法开发和生产提供各类解决方案和服务。

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