Protein Modification Reagents
![Medchemexpress LLC Ethanol, 2-[2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]ethoxy] tosylate | 236754-49-7 | 99.3% | 417.48 g/mol | C17H27N3O7S | 500 MG](https://assets.fishersci.com/TFS-Assets/CCG/product-images/5000203783.png-250.jpg)
Medchemexpress LLC Ethanol, 2-[2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]ethoxy] tosylate | 236754-49-7 | 99.3% | 417.48 g/mol | C17H27N3O7S | 500 MG
Azide-PEG5-Tos is a cleavable PEG-based linker bearing an azide functional group and a tosylate leaving group. It is used as a click-chemistry handle and linker in the synthesis of antibody-drug conjugates and other bioconjugation applications. The reagent is supplied as a solid and is typically dissolved in DMSO for reactions.
- Cleavable 5-unit polyethylene glycol spacer
- Contains an azide functional group for copper-catalyzed azide-alkyne cycloaddition
- Contains a tosylate leaving group for downstream modification
- High purity suitable for synthetic chemistry applications
- Stable under cold storage when handled per supplier recommendations
![eMolecules endo-BCN-Peg3-maleimide | Combi-Blocks, Inc. | 2141976-33-0 | | 519.595 | C26H37N3O8 | 95.000 | O=C(CCN1C(=O)C=CC1=O)NCCOCCOCCOCCNC(=O)OC[C@@H]1[C@@H]2CCC#CCC[C@H]12 | 100mg | 569346425](https://assets.fishersci.com/TFS-Assets/CCG/product-images/NC2318776.JPG-250.jpg)
eMolecules endo-BCN-Peg3-maleimide | Combi-Blocks, Inc. | 2141976-33-0 | | 519.595 | C26H37N3O8 | 95.000 | O=C(CCN1C(=O)C=CC1=O)NCCOCCOCCOCCNC(=O)OC[C@@H]1[C@@H]2CCC#CCC[C@H]12 | 100mg | 569346425
endo-BCN-Peg3-maleimide | Combi-Blocks, Inc. | 2141976-33-0 | | 519.595 | C26H37N3O8 | 95.000 | O=C(CCN1C(=O)C=CC1=O)NCCOCCOCCOCCNC(=O)OC[C@@H]1[C@@H]2CCC#CCC[C@H]12 | 100mg | 569346425
![eMolecules Broadpharm / 14-(Azide-PEG4-ethylcarbamoyl)tridecanoic-t-butyl ester / 100mg / 784455327 / BP-29925 / 95.000 / / [null] / 558.761 / C28H54N4O7](https://assets.fishersci.com/TFS-Assets/CCG/product-images/502473290.JPG-250.jpg)
eMolecules Broadpharm / 14-(Azide-PEG4-ethylcarbamoyl)tridecanoic-t-butyl ester / 100mg / 784455327 / BP-29925 / 95.000 / / [null] / 558.761 / C28H54N4O7
Broadpharm / 14-(Azide-PEG4-ethylcarbamoyl)tridecanoic-t-butyl ester / 100mg / 784455327 / BP-29925 / 95.000 / / [null] / 558.761 / C28H54N4O7
eMolecules Broadpharm / Cy5-PEG4-acid / 10mg / 263744692 / BP-22346 / 96.000 / / MFCD28142461 / 766.420 / C43H60ClN3O7
Broadpharm / Cy5-PEG4-acid / 10mg / 263744692 / BP-22346 / 96.000 / / MFCD28142461 / 766.420 / C43H60ClN3O7
Cayman Chemical dPE-PEG 2000 MaleImIde 5mg
A metabolite of linoleic acid increases transactivation of PPARa and PPARY in reporter assays using mouse aortic endothelial cells at 68 UM induces chemotaxis of primary human monocytes at 10 UM has been found in oxLDL
Cayman Chemical Boc-NH-PEG3-CH2CoH 25mg
A building block; has been used as a linker in the synthesis of PROTACs targeting MEK; has been used as a spacer in the synthesis of radiolabeled probes for dual labeling of tumor integrin αVβ3 and GRPR in tumor tissue in vivo
eMolecules Fmoc-PEG3-NHS ester | 1352827-47-4 | MFCD28142471 | 1g
Broadpharm | Fmoc-PEG3-NHS ester | 1g | 263744723 | BP-22334 | 98.000 | 1352827-47-4 | MFCD28142471 | 540.569 | C28H32N2O9
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eMolecules Building Block Tool
Medchemexpress LLC Mal-PEG2-Val-Cit-PABA | 1662687-83-3 | 98.9% | 590.63 | C27H38N6O9 | 5 MG
Mal-PEG2-Val-Cit-PABA is a cleavable antibody-drug conjugate (ADC) linker designed for synthesis of ADCs. It features a maleimide reactive handle, a PEG2 spacer for improved hydrophilicity, and a Val-Cit-PABA cleavage motif that enables protease-mediated release of payloads in target cells.
- Cleavable Val-Cit-PABA motif for protease-triggered payload release.
- Maleimide functional group for thiol-selective conjugation to antibodies.
- PEG2 spacer increases hydrophilicity and may reduce aggregation.
- High chemical purity suitable for research and ADC synthesis.
- Stable when stored as powder at -20°C; follow recommended solvent storage conditions.
Medchemexpress LLC BCN-endo-PEG2-maleimide | 2675364-08-4 | 98.1% | 475.53 | C24H33N3O7 | 25 MG
A bifunctional linker reagent containing an endo-bicyclononyne reactive group and a maleimide separated by a PEG2 spacer, designed for strain-promoted azide-alkyne cycloaddition and thiol conjugation in bioconjugation and drug-delivery workflows.
- Contains endo-bicyclononyne and maleimide reactive groups.
- Peg2 spacer provides flexibility and solubility.
- Enables catalyst-free strain-promoted azide-alkyne cycloaddition (SPAAC) with azides.
- Compatible with maleimide-mediated thiol conjugation.
- High purity and defined molecular weight for reproducible conjugation.
eMolecules Broadpharm / SPDP-PEG8-NHS ester / 100mg / 229582559 / BP-21933 / 95.000 / 1252257-56-9 / MFCD13185003 / 735.860 / C31H49N3O13S2
Broadpharm / SPDP-PEG8-NHS ester / 100mg / 229582559 / BP-21933 / 95.000 / 1252257-56-9 / MFCD13185003 / 735.860 / C31H49N3O13S2
eMolecules Aminooxy-PEG1-amine | 1510385-08-6 | | 250mg
Broadpharm | Aminooxy-PEG1-amine | 250mg | 550804660 | BP-24470 | 98.000 | 1510385-08-6 | | 120.152 | C4H12N2O2
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eMolecules Building Block Tool
eMolecules Ambeed / 1-(9H-Fluoren-9-yl)-3-oxo-27101316-pentaoxa-4-azanonadecan-19-oic acid / 100mg / 490490352 / A104811 / / 557756-85-1 / MFCD06656472 / 487.549 / C26H33NO8
Ambeed / 1-(9H-Fluoren-9-yl)-3-oxo-27101316-pentaoxa-4-azanonadecan-19-oic acid / 100mg / 490490352 / A104811 / / 557756-85-1 / MFCD06656472 / 487.549 / C26H33NO8