Anti-Aggrecan G1-IGD-G2 Domains (Proteoglycan, PG, AGC 1, Aggrecan 1, Antigen identified by monoclon

As the key component of the cartilage extracellular matrix, aggrecan hydrates the collagen network and provides cartilage with its properties of compressibility and elasticity. Maintenance of aggrecan content is therefore critical to the function of the tissue and aggrecan degradation is an important factor in the erosion of articular cartilage in arthritic diseases. The deduced amino acid sequence of human aggrecan core protein consists of 2415 resides and predicts a signal peptide and domains of G1, IGD, G2, KS, CS-1, CS-2, and G3. Two globular domains, G1 and G2, comprise the N­terminus of the proteoglycan and also contain link domains. The third globular domain, G3, corresponds to the C-terminus. The keratan sulfate (KS) and the chondroitin sulfate (CS) attachment domains are between G2 and G3. With KS and CS attached to the 250kD core protein, aggrecan monomers exist as a 1000-2000 kD molecule. In addition, aggrecan monomers interact with hyaluronan through their G1 domain, resulting in larger aggregates containing 10-100 aggrecan monomers on a hyaluronan backbone. Applications: Suitable for use in ELISA, Immunohistochemistry and Western Blot. Other applications not tested. Recommended Dilution: Immunohistochemistry: 15ug/ml detects aggrecan in calls and tissues., Western Blot: 0.1-0.2ug/ml the detection limit is ~5ng/lane under reducing and non-reducing conditions., Direct ELISA: 0.5-1ug/ml the dection limit is ~0.5ng/well., Optimal dilutions to be determined by the researcher. Storage and Stability: Lyophilized powder may be stored at -20°C. Stable for 12 months at -20°C. Reconstitute with sterile PBS. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Reconstituted product is stable for 12 months at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.