CD44 Monoclonal Antibody (Hermes-1), Functional Grade, eBioscience™, Invitrogen™

Description

• Description: This Hermes-1 clone targets human, rabbit, goat, bovine and ovine CD44, but does not demonstrate reactivity toward mouse CD44
• This antibody is a functional grade (endotoxin-tested, azide-free) form of Product # MA4400
• Applications Reported: This Hermes-1 antibody has been reported for use in functional assays
• (Fluorochrome-conjugated Hermes-1 is recommended for use in flow cytometery.) Applications Tested: The Hermes-1 antibody has been tested by flow cytometric analysis of normal human peripheral blood cells
• This can be used at less than or equal to 0.06 μg per test
• A test is defined as the amount (μg) of antibody that will stain a cell sample in a final volume of 100 μL
• Cell number should be determined empirically but can range from 10^5 to 10^8 cells/test
• It is recommended that the antibody be carefully titrated for optimal performance in the assay of interest
• Endotoxin: Less than 0.001 ng/ug antibody as determined by the LAL assay
• Storage and handling: Use in a sterile environment
• Purity: Greater than 90%, as determined by SDS-PAGE
• Aggregation: Less than 10%, as determined by HPLC
• CD44 cell surface antigen is a 100 kDa type 1 transmembrane glycoprotein widely expressed on human leucocytes, white matter of the brain and by some epithelial cells of the intestine and breast
• Several isoforms of CD44 exist, including the predominant CD44H isoform detected in many normal tissues
• CD44 is a receptor for hyaluronic acid (HA) and is involved in cell-cell interactions, cell adhesion and migration
• CD44 also participates in a wide variety of cellular functions including lymphocyte activation, recirculation and homing
• CD44 expression may be up-regulated upon some carcinomas, and it has been speculated that this may be related to metastatic potential
• CD44 is expressed by hematopoietic, non-hematopoietic cells, epithelial tissues, and to filopodia in cultured keratinocytes
• Further, bone marrow myeloid cells and memory T cells express CD44 at high levels, and peripheral B and T cells can upregulate the expression of CD44 in response to certain stimulatory events
• Transcripts for the CD44 gene undergo complex alternative splicing that results in many functionally distinct isoforms, however, the full-length nature of some of these variants have not been determined
• Alternative splicing is the basis for the structural and functional diversity of the CD44 protein
• Diseases associated with CD44 dysfunction include superficial keratitis and lichen sclerosus
• CD44 also may be related to tumor metastasis formation.