Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
6 months, -20 to -70 °C under sterile conditions after reconstitution.
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.
Reconstitute at 0.5 mg/mL in sterile PBS.
This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.
Alternate Names for GASP-1/WFIKKN2 Antibody (288513) [Unconjugated]
Growth and differentiation factor-associated serum protein 1
WAP, follistatin, immunoglobulin, kunitz and NTR domain-containing-relatedprotein
WAP, follistatin/kazal, immunoglobulin, kunitz and netrin domain containing 2
WAP, FS, Ig, two KU and NTR module related protein
WAP, kazal, immunoglobulin, kunitz and NTR domain-containing protein 2
WFIKKNRPmultivalent protease inhibitor protein
Growth and differentiation factor-associated serum protein-1 (GASP-1) was isolated in a screen to identify proteins in mice that copurify with myostatin (GDF-8), a potent negative regulator of skeletal muscle mass (1). The GASP-1 cDNA encodes a 571 amino acid (aa) protein that contains a 29 aa signal sequence and is comprised of many conserved domains: WAP, follistatin/Kazal, immunoglobulin, two tandem Kunitz, and netrin (1). Two related human proteins which contain the same domain structure are called WFIKKN (based on the presence and order of these conserved domains) and WFIKKNRP (WFIKKN-related protein) (2). Mouse GASP-1 is homologous to human WFIKKNRP and mouse GASP-2 to human WFIKKN. Human GASP-1 is the same protein as WFIKKNRP. WAP, follistatin, Kazal and netrin domains are all implicated in protease inhibition, and these proteins may be multivalent protease inhibitors (3). GASP-1 and -2 show distinct expression patterns both in the developing fetus and the adult. In the developing fetus, GASP-1 expression is highest in the brain, skeletal muscle, thymus and kidney while GASP‑2 is abundant in the lung, skeletal muscle and liver (4). In the adult, GASP-1 is primarily expressed in the ovary, testis, and brain while GASP‑2 is in the pancreas, liver, and thymus (4). GASP-1 inhibits myostatin and the highly related protein, GDF-11, but not Activin or TGF-beta in vitro (1). In addition, GASP-1 binds directly but independently to both mature myostatin and the myostatin propeptide (1). By aa sequence, human GASP-1 is 90% and 55% identical to mouse GASP-1 and human GASP-2, respectively.
Hill, J.J. et al. (2003) Mol. Endo. 17:1144.
Trexler, M. et al. (2001) Proc. Natl. Acad. Sci. 98:3705.
Nagy, A. et al. (2003) Eur. Jour. Biochem. 270:2101.
Trexler, M. et al. (2002) Biol. Chem. 383:223.
This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.
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