Specification:
S-100 protein has been found in normal melanocytes, Langerhans cells, histiocytes, chondrocytes, lipocytes, skeletal and cardiac muscle, Schwann cells, epithelial and myoepithelial cells of the breast, salivary and sweat glands, as well as in glial cells. Neoplasms derived from these cells also express S-100 protein, albeit non-uniformly. A large number of well differentiated tumors of the salivary gland, adipose and cartilaginous tissue, and Schwann cell derived tumors express S-100 protein. Almost all malignant melanomas and cases of histiocytosis x are positive for S-100 protein. Despite the fact that S-100 protein is an ubiquitous substance, its demonstration is of great value in the identification of several neoplasms, particularly melanomas. The antibody reacts with human and cow S-100 protein A and B. In the brain it labels glial and ependymal cells. Melanocytes and Langerhans cells of the skin also stain positive.
Immunogen:
Affinity purified S-100 protein isolated from cow brain
Presentation:
Purified immunoglobulin fraction of rabbit antiserum against S100 containing sodium azide as a preservative
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