• Product name

  • Description

    Rabbit polyclonal to SOS1
  • Host species

  • Tested applications

    Suitable for: WB, IHC-Pmore details
  • Species reactivity

    Reacts with: Human
    Predicted to work with: Mouse
  • Immunogen

    Synthetic peptide corresponding to Human SOS1 aa 1300 to the C-terminus (C terminal) conjugated to keyhole limpet haemocyanin.
    (Peptide available as ab35701)

  • Positive control

    • This antibody gave a positive signal in the following whole cell lysates: HEK293 Human embryonic kidney cell line) HepG2 (Human hepatocellular liver carcinoma cell line) MCF7 (Human breast adenocarcinoma cell line) IHC-P (FFPE): Hu Placenta (normal) tissue.



Our Abpromise guarantee covers the use of ab35702 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
WB Use a concentration of 1 µg/ml. Detects a band of approximately 165 kDa (predicted molecular weight: 170 kDa).
IHC-P Use a concentration of 1 µg/ml. Perform heat mediated antigen retrieval with citrate buffer pH 6 before commencing with IHC staining protocol.


  • Function

    Promotes the exchange of Ras-bound GDP by GTP.
  • Tissue specificity

    Expressed in gingival tissues.
  • Involvement in disease

    Defects in SOS1 are the cause of gingival fibromatosis 1 (GGF1) [MIM:135300]; also known as GINGF1. Gingival fibromatosis is a rare overgrowth condition characterized by a benign, slowly progressive, nonhemorrhagic, fibrous enlargement of maxillary and mandibular keratinized gingiva. GGF1 is usually transmitted as an autosomal dominant trait, although sporadic cases are common.
    Defects in SOS1 are the cause of Noonan syndrome type 4 (NS4) [MIM:610733]. NS4 is an autosomal dominant disorder characterized by dysmorphic facial features, short stature, hypertelorism, cardiac anomalies, deafness, motor delay, and a bleeding diathesis. It is a genetically heterogeneous and relatively common syndrome, with an estimated incidence of 1 in 1000-2500 live births. Rarely, NS4 is associated with juvenile myelomonocytic leukemia (JMML). SOS1 mutations engender a high prevalence of pulmonary valve disease; atrial septal defects are less common.
  • Sequence similarities

    Contains 1 DH (DBL-homology) domain.
    Contains 1 N-terminal Ras-GEF domain.
    Contains 1 PH domain.
    Contains 1 Ras-GEF domain.
  • Information by UniProt
  • Database links

  • Alternative names

    • alternate SOS1 antibody
    • GF1 antibody
    • GGF1 antibody
    • GINGF antibody
    • gingival fibromatosis antibody
    • gingival fibromatosis hereditary 1 antibody
    • Guanine nucleotide exchange factor antibody
    • HGF antibody
    • NS4 antibody
    • Son of sevenless homolog 1 (Drosophila) antibody
    • Son of sevenless homolog 1 antibody
    • SOS Ras/Rac guanine nucleotide exchange factor 1 antibody
    • SOS-1 antibody
    • Sos1 antibody
    • SOS1_HUMAN antibody
    see all


  • IHC image of SOS1 staining in Human Placenta formalin fixed paraffin embedded tissue section, performed on a Leica Bond system using the standard protocol F. The section was pre-treated using heat mediated antigen retrieval with sodium citrate buffer (pH6, epitope retrieval solution 1) for 20 mins. The section was then incubated with ab35702, 1µg/ml, for 15 mins at room temperature and detected using an HRP conjugated compact polymer system. DAB was used as the chromogen. The section was then counterstained with haematoxylin and mounted with DPX.

  • All lanes : Anti-SOS1 antibody (ab35702) at 1 µg/ml

    Lane 1 : HEK293 whole cell lysate (ab7902)
    Lane 2 : HepG2 whole cell lysate (ab7900)
    Lane 3 : MCF7 (Human breast adenocarcinoma cell line) Whole Cell Lysate

    Lysates/proteins at 10 µg per lane.

    All lanes : IRDye 680 Conjugated Goat Anti-Rabbit IgG (H+L) at 1/10000 dilution

    Performed under reducing conditions.

    Predicted band size: 170 kDa
    Observed band size: 165 kDa
    why is the actual band size different from the predicted?
    Additional bands at: 190 kDa. We are unsure as to the identity of these extra bands.


ab35702 has not yet been referenced specifically in any publications.

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