Human Endophilin B1/Bif-1 Antibody

  
  • Species Reactivity
    Human
  • Specificity
    Detects human Endophilin B1/Bif-1 in direct ELISAs and Western blots. In direct ELISAs, less than 1% cross-reactivity with recombinant human SH3GLB2 is observed.
  • Source
    Polyclonal Sheep IgG
  • Purification
    Antigen Affinity-purified
  • Immunogen
    E. coli-derived recombinant human Endophilin B1/Bif-1
    Ala33-Asn189
    Accession # Q9Y371
  • Formulation
    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.
  • Label
    Unconjugated
Applications
  •  
    Recommended
    Concentration
    Sample
  • Western Blot
    1 µg/mL
    See below
  • Immunocytochemistry
    5-15 µg/mL
    See below
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.
Data Examples
Detection of Human Endophilin B1/Bif‑1 by Western Blot. Western blot shows lysates of Jurkat human acute T cell leukemia cell line, Saos‑2 human osteosarcoma cell line, and U‑118‑MG human glioblastoma/astrocytoma cell line. PVDF membrane was probed with 1 µg/mL of Sheep Anti-Human Endophilin B1/Bif‑1 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF7456) followed by HRP-conjugated Anti-Sheep IgG Secondary Antibody (Catalog # HAF016). A specific band was detected for Endophilin B1/Bif‑1 at approximately 43 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
Immunocytochemistry
Endophilin B1/Bif‑1 in Jurkat Human Cell Line. Endophilin B1/Bif‑1 was detected in immersion fixed Jurkat human acute T cell leukemia cell line using Sheep Anti-Human Endophilin B1/Bif‑1 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF7456) at 5 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Anti-Sheep IgG Secondary Antibody (red; Catalog # NL010) and counterstained with DAPI (blue). Specific staining was localized to cytoplasm. View our protocol for Fluorescent ICC Staining of Non-adherent Cells.
Preparation and Storage
  • Reconstitution
    Sterile PBS to a final concentration of 0.2 mg/mL.
  • Shipping
    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.
Background: Endophilin B1/Bif-1
Endophilin-B1, also known as SH3GLB1 (Src-Homology 3 Domain-containing GRB2-like protein B1) and BIF-1, is a 40 kDa protein that belongs to the endophilin family of molecules. It is a cytoplasmic and Golgi membrane protein that is expressed in neurons, striated (skeletal and cardiac) muscle cells, and placenta. Endophilin-B1 plays a role in cell homeostasis. In neurons, Endophilin-B1 is phosphorylated by Cdk5, inducing homodimerization and autophagosome formation. In addition, it appears to play a role in the maintenance of mitochondrial integrity. Endophilin-B1 appears to cycle on-and-off the outer mitochondrial membrane (OMM), contributing to OMM integrity. And after the initiation of endocytosis, it also directs EEA1+ TrkA-containing endosomes back into the cell membrane for reuse. Human Endophilin‑B1 is 365 amino acids (aa) in length. It possesses an N-terminal lipid-binding BAR (Bin/Amphiphysin/Rvs) domain (aa 27-261) that contains an internal coiled-coil region, and a C-terminal SH3 domain that binds Pro-rich sequences on potential ligands (309-363). There are at least three potential splice variants for Endophilin-B1. Two are 42 and 43 kDa in size, and possess a 21 and 29 aa insertion after Ser190, respectively. A third potentially utilizes an alternative start site at Met101. Over aa 33-189, human Endophilin-B1 shares 98% aa sequence identity with mouse Endophilin-B1.
  • Long Name:
    SH3-domain GRB2-like Endophilin B1/Bax-interacting Factor 1
  • Entrez Gene IDs:
    51100 (Human); 54673 (Mouse); 292156 (Rat)
  • Alternate Names:
    Bax-interacting factor 1; Bif1; Bif-1; Bif-1dJ612B15.2; CGI-61; Endophilin B1; endophilin-B1; KIAA0491endophilin B1; SH3 domain-containing GRB2-like protein B1; SH3-containing protein SH3GLB1; SH3-domain GRB2-like endophilin B1; SH3-domain, GRB2-like, endophilin B1; SH3GLB1
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