CD99 Human

CD99 Human Recombinant
Cat. No.
BT30912
Source

Sf9, Baculovirus cells.

Synonyms

CD99 antigen, T-cell surface glycoprotein E2, E2 antigen, Protein MIC2, 12E7, CD99, MIC2, MIC2X, MIC2Y.

Appearance
Sterile filtered colorless solution.
Purity

Greater than 95.0% as determined by SDS-PAGE.

Usage
THE BioTek's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.
Shipped with Ice Packs
In Stock

Description

CD99 Human Recombinant produced in Sf9 Baculovirus cells is a single, glycosylated polypeptide chain containing 342 amino acids (23-122a.a.) and having a molecular mass of 37.3kDa (Molecular size on SDS-PAGE will appear at approximately 40-57kDa).
CD99 is expressed with a 239 amino acids hIgG-His tag at C-Terminus and purified by proprietary chromatographic techniques.

Product Specs

Introduction
CD99, also known as MIC2 gene product or E2 antigen, is found on the surface of certain immune cells like some lymphocytes and cortical thymocytes. It's also present on granulosa cells (ovary), most pancreatic islet cells, Sertoli cells (testis), and some endothelial cells. However, mature granulocytes show minimal to no CD99 expression. Notably, MIC2 is highly expressed on Ewing's sarcoma cells and primitive peripheral neuroectodermal tumors.
Description
Recombinant human CD99, produced in Sf9 insect cells using a baculovirus expression system, is a single polypeptide chain with glycosylation. It comprises 342 amino acids (specifically, residues 23-122a.a.) and has a molecular weight of 37.3 kDa. On SDS-PAGE, it appears around 40-57 kDa due to glycosylation. This CD99 protein includes a 239 amino acid hIgG-His tag at its C-terminus and is purified using proprietary chromatography techniques.
Physical Appearance
The product is a colorless and sterile-filtered solution.
Formulation
The CD99 protein solution has a concentration of 1 mg/ml and is formulated in Phosphate Buffered Saline (pH 7.4) with 10% glycerol.
Stability
For short-term storage (up to 2-4 weeks), keep the vial at 4°C. For extended storage, freeze the product at -20°C. Adding a carrier protein (0.1% HSA or BSA) is recommended for long-term storage. Avoid repeatedly freezing and thawing the product.
Purity
The purity of the CD99 protein is greater than 95.0% as determined by SDS-PAGE analysis.
Synonyms

CD99 antigen, T-cell surface glycoprotein E2, E2 antigen, Protein MIC2, 12E7, CD99, MIC2, MIC2X, MIC2Y.

Source

Sf9, Baculovirus cells.

Amino Acid Sequence

ADPDGGFDLS DALPDNENKK PTAIPKKPSA GDDFDLGDAV VDGENDDPRP PNPPKPMPNP NPNHPSSSGS FSDADLADGV SGGEGKGGSD GGGSHRKEGE EADLEPKSCD KTHTCPPCPA PELLGGPSVF LFPPKPKDTL MISRTPEVTC VVVDVSHEDP EVKFNWYVDG VEVHNAKTKP REEQYNSTYR VVSVLTVLHQ DWLNGKEYKC KVSNKALPAP IEKTISKAKG QPREPQVYTL PPSRDELTKN QVSLTCLVKG FYPSDIAVEW ESNGQPENNY KTTPPVLDSD GSFFLYSKLT VDKSRWQQGN VFSCSVMHEA LHNHYTQKSL SLSPGKHHHH HH.

Product Science Overview

Structure and Characteristics

Native human CD99 is approximately 32 kDa in size and exists as a type I transmembrane glycoprotein . The recombinant form of CD99 is often produced in a mouse myeloma cell line (NS0-derived) and is typically purified to a high degree of purity, often greater than 90% as determined by SDS-PAGE under reducing conditions . The recombinant protein is usually lyophilized from a filtered solution in PBS and can be reconstituted in sterile PBS for use in various applications .

Biological Functions

CD99 is involved in several essential cellular functions, including:

  • Cell Adhesion and Migration: CD99 plays a role in the adhesion and migration of cells, which is critical for immune responses and tissue repair .
  • Cell Death and Differentiation: It is involved in the regulation of cell death and differentiation, which is important for maintaining cellular homeostasis .
  • Intracellular Protein Trafficking: CD99 is implicated in the trafficking of proteins within cells, affecting processes such as endocytosis and exocytosis .
Clinical Significance

CD99 is notably expressed in Ewing sarcoma (EWS) cells, a type of pediatric bone tumor. Targeting CD99 in EWS cells has been shown to inhibit tumor growth by inducing cell death and promoting phagocytosis by macrophages . This makes CD99 a potential therapeutic target for treating EWS and possibly other cancers.

Research and Applications

Recombinant human CD99 is widely used in research to study its functions and potential therapeutic applications. It is often used in functional assays, such as ELISA, to measure its binding activity and interactions with other molecules . Additionally, CD99’s role in immune cell regulation and tumor biology makes it a valuable target for developing new cancer therapies .

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