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| Description | The 15-aa N-terminal RNase-A S-tag (KETAAAKFERQHMDS), binding S-protein with high affinity; a common tag for western blot, IP and quantitation. |
Product Basic Information Table
| Product Standard English Name | Product Abbreviation / Alias | Function Tags (comma-separated) | Core Structure | Molecular Formula | Exact Mass (Da) | Average MW (Da) | Salt Form | Length (aa) |
| S-Tag Peptide (S15, RNase A S-peptide residues 1-15) | S-tag / S15 peptide / RNase A S-peptide 1-15 | Tag peptide, protein detection, protein purification, S-protein, recombinant protein expression | H-Lys-Glu-Thr-Ala-Ala-Ala-Lys-Phe-Glu-Arg-Gln-His-Met-Asp-Ser-OH; N-terminal 15 residues of bovine pancreatic RNase A (S-peptide); noncovalently reconstitutes active RNase S with S-protein. | C73H117N23O25S | 1747.83 | 1748.93 | Free peptide | 15 |
Physicochemical Solubility & Storage Parameters
| Product Code | Appearance | Long-term Storage | Short-term Storage | Solution Stability | Solid Powder Stability |
| PEP-STAG-01 | White to off-white powder | Store at -20°C, sealed, desiccated (contains Met; degas and flush with inert gas) | 2-8°C sealed, desiccated, ~2-4 weeks | Hydrophilic tag peptide; solubility H2O ≥50 mg/mL, DMSO ≥174.9 mg/mL (APExBIO). Contains Met: avoid oxidizers and keep solutions degassed | Contains 1 Met (readily oxidized to Met sulfoxide); store dry, degassed, sealed under Ar/N2; minimize repeated opening |
Functional Description
| Product Code | Frontend Short Summary | Detailed Biological Function Description | Applicable Research Areas (comma-separated) | Targets / Pathways |
| PEP-STAG-01 | RNase A S-peptide 1-15 tag, detection/purification of recombinant proteins, reconstitutes with S-protein | S-tag (S15) is the N-terminal 15 residues of bovine pancreatic ribonuclease A (RNase A S-peptide 1-15). Released together with S-protein by subtilisin cleavage of RNase A; the two fragments noncovalently reconstitute active ribonuclease S. Fused to recombinant proteins it enables detection/purification via S-protein or anti-S-tag antibodies and improves tagged-protein solubility. Note: the full S-peptide is 20 aa (1-20 KETAAAKFERQHMDSSTSA); CAS 7429-70-1 corresponds specifically to the 15-mer S-tag. | Molecular biology, protein engineering, protein purification, recombinant expression, detection tag | S-protein / anti-S-tag antibody |
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