Detects human GDF-1 in direct ELISAs and Western blots. In direct ELISAs, approximately 80%
cross-reactivity with recombinant mouse (rm) GDF-1 is observed, and no
cross-reactivity with recombinant human (rh) GDF-3 is observed. In Western
blots, no cross-reactivity with rhGDF-3 or rmGDF-7 is observed.
Monoclonal Mouse IgG2B Clone # 748450
Protein A or G purified from hybridoma culture supernatant
Chinese hamster ovary cell line CHO-derived recombinant human GDF-1 Asp254-Arg372 Accession # NP_001483
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Detection of Human GDF‑1 by Western Blot. Western blot shows lysates of human brain (cortex) tissue. PVDF membrane was probed with 2 µg/mL of Mouse Anti-Human GDF‑1 Monoclonal Antibody (Catalog # MAB6937) followed by HRP-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # HAF007). A specific band was detected for GDF‑1 at approximately 45 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
Preparation and Storage
Sterile PBS to a final concentration of 0.5 mg/mL.
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
Stability & Storage
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.
Growth and Differentiation Factor 1 (GDF‑1) is a secreted protein in the TGF‑ beta superfamily (1). It is the functional equivalent of frog, zebrafish, and chick Vg1 (2, 3). Human GDF‑1 is synthesized as a preproprotein that produces an approximately 44 kDa proprotein after cleavage of a 29 amino acid (aa) signal peptide. Further proteolysis at a dibasic cleavage site produces a 224 aa propeptide and a secreted 119 aa, 12‑15 kDa mature peptide (4). Mature human GDF‑1 shares 81% aa sequence identity with mouse and rat GDF‑1. GDF‑1 is expressed in the developing and adult nervous system, particularly in neurons of the cerebral cortex and hippocampus (4, 5). It is required during embryogenesis for development of left/right axis asymmetry, anterior/posterior axis asymmetry, and the notochord (2, 3, 6, 7). It cooperates with Nodal and GDF‑3 in these activities and potentiates Nodal bioactivity through formation of a 27 kDa noncovalent GDF‑1‑Nodal heterodimer (3, 7, 8). The presence of Nodal is required for GDF‑1 induced effects (8). GDF‑1 signals through heteromeric receptor complexes containing Activin RIIA or Activin RIIB, ALK4 or ALK7, and an EGF‑CFC protein such as Cryptic or Cripto (7‑9). Loss of function mutations in GDF‑1 are associated with a variety of human cardiac development defects (10).
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