GIF / Gastric intrinsic factor Protein (His Tag)

Gastric intrinsic factor Protein Datasheet

GIF / Gastric intrinsic factor Protein Product Information

• Synonym: GIF, IFMH
• Protein Construction: A DNA sequence encoding the human GIF (P27352-1) (Met1-Tyr417) was expressed with a polyhistidine tag at the C-terminus.
• Source: Human
• Expression Host: Human Cells

GIF / Gastric intrinsic factor Protein QC Testing

• Purity: > 95% as determined by SDS-PAGE
• Endotoxin: < 1.0 EU per μg of the protein as determined by the LAL method
• Stability: Samples are stable for up to twelve months from date of receipt at -70℃
• Predicted N terminal: Ser 19
• Molecular Mass: The recombinant human GIF consists of 410 amino acids and predicts a molecular mass of 44.8 KDa. It migrates as an approximately 49 KDa band in SDS-PAGE under reducing conditions.
• Formulation: Lyophilized from sterile PBS, pH 7.4.
  1. Normally 5 % - 8 % trehalose and mannitol are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
  2. Please contact us for any concerns or special requirements.
• SDS-PAGE: GIF / Gastric intrinsic factor protein

GIF / Gastric intrinsic factor Protein Usage Guide

• Storage: Store it under sterile conditions at -70℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
• Reconstitution: A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.

GIF / Gastric intrinsic factor Protein Description

Gastric intrinsic factor, also known as GIF, is a glycoprotein produced by the parietal cells of the stomach. It is a member of the cobalamin transport protein family. Gastric intrinsic factor is required for adequate absorption of vitamin B12 in the terminal ileum. Vitamin B12 is essential for erythrocyte maturation and mutations in the Intrinsic Factor may lead to congenital pernicious anemia. Vitamin B12 bounds to haptocorrin after entry into the stomach. The resulting complex enters the duodenum, where pancreatic enzymes digest haptocorrin. In the less acidic environment of the small intestine, B12 can then bind to gastric intrinsic factor. This new complex travels to the ileum, where special epithelial cells endocytose them. Inside the cell, B12 dissociates once again and binds to another protein, transcobalamin II. The new complex can exit the epithelial cells to enter the liver.

References

1. Gerdin AK. 2010, Acta Opthalmologica. 88: 925-7.
2. AU - Berlin H. et al., 1968, Acta Medica Scandinavica. 184 (1-6): 247-58.
3. Hewitt JE. et al., 1991, Genomics. 10 (2): 432-40.