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Synonyms: transcobalamin II, TCII, TC-2, TC2, TC, II, D22S750, D22S676

| Pack Size | Price | USA Stock | Global Stock | Quantity |
|---|---|---|---|---|
| 5 µg | $109 | - | In Stock | |
| 10 µg | $182 | - | In Stock | |
| 20 µg | $296 | - | In Stock | |
| 50 µg | $600 | - | In Stock | |
| 100 µg | $1,030 | 7-10 days | 7-10 days | |
| 200 µg | $1,750 | 7-10 days | 7-10 days | |
| 500 µg | $3,530 | 7-10 days | 7-10 days |
| Bioactivity | Immobilized CD320 Protein, Mouse, Recombinant (hFc Tag) at 2 μg/mL (100 μL/well) can bind TCN2 Protein, Human, Recombinant (His Tag), the EC50 is 10-62 ng/mL. |
| Description | TCN2 Protein, Human, Recombinant (His) is expressed in HEK293 mammalian cells with His tag. The predicted molecular weight is 46.7 kDa and the accession number is P20062-1. |
| Species | Human |
| Expression System | HEK293 Cells |
| Tag | C-His |
| Accession Number | P20062-1 |
| Construction | A DNA sequence encoding the human TCN2 (NP_000346.2) (Met 1-Trp 427) with a C-terminal polyhistidine tag was expressed. Predicted N terminal: Glu 19 |
| Protein Purity | > 90 % as determined by SDS-PAGE ![]() |
| Endotoxin | < 1.0 EU/μg of the protein as determined by the LAL method. |
| Formulation | Lyophilized from a solution filtered through a 0.22 μm filter, containing PBS, pH 7.4. Typically, a mixture containing 5% to 8% trehalose, mannitol, and 0.01% Tween 80 is incorporated as a protective agent before lyophilization. |
| Reconstitution | Reconstituted with sterile deionized water to 0.25 mg/mL. Reconstitution conditions may vary depending on the lot. |
| Synonyms | transcobalamin II, TCII, TC-2, TC2, TC, II, D22S750, D22S676 |
| Research Background | Transcobalamin II, also known as TCN2 and TC II, is a plasma protein that binds cobalamin (Cbl; vitamin B12) as it is absorbed in the terminal ileum and distributes to tissues. The circulating transcobalamin II-cobalamin complex binds to receptors on the plasma membrane of tissue cells and is then internalized by receptor-mediated endocytosis. Transcobalamin II is a non-glycolated secretory protein of molecular mass 43 kDa. Its plasma membrane receptor (TC II-R) is a heavily glycosylated protein with a monomeric molecular mass of 62 kDa. Human TCN2 gene is composed of nine exons and eight introns spanning approximately 2 kb with multiple potential transcription start sites. A number of genetic abnormalities are characterized either by a failure to express TCN2 or by synthesis of an abnormal protein. The TCN2 deficiency results in cellular cobalamin deficiency, an early onset of megaloblastic anaemia, and neurological abnormalities. |
| Molecular Weight | 46.7 kDa (predicted); 43 kDa (reducing conditions) |
| Shipping | In general, lyophilized powders are shipped with blue ice, while solutions are shipped with dry ice. |
| Storage | It is recommended to store recombinant proteins at -20°C to -80°C for future use. Lyophilized powders can be stably stored for over 12 months, while liquid products can be stored for 6-12 months at -80°C. For reconstituted protein solutions, the solution can be stored at -20°C to -80°C for at least 3 months. Please avoid multiple freeze-thaw cycles and store products in aliquots. |
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