Protein Modification Reagents
![eMolecules Broadpharm / 160 PEG PE MW 550 / 5mg / 718091900 / BP-28300 / / 474922-84-4 / [null] / 794.061 / C41H80NO11P](https://assets.fishersci.com/TFS-Assets/CCG/product-images/default.jpg-250.jpg)
eMolecules Broadpharm / 160 PEG PE MW 550 / 5mg / 718091900 / BP-28300 / / 474922-84-4 / [null] / 794.061 / C41H80NO11P
Broadpharm / 160 PEG PE MW 550 / 5mg / 718091900 / BP-28300 / / 474922-84-4 / [null] / 794.061 / C41H80NO11P
![eMolecules Broadpharm / Biotin-PEG-Silane MW 3400 / 100mg / 627958168 / BP-25193 / / / [null] / 577.810 / C24H47N5O7SSi](https://assets.fishersci.com/TFS-Assets/CCG/product-images/502499844.JPG-250.jpg)
eMolecules Broadpharm / Biotin-PEG-Silane MW 3400 / 100mg / 627958168 / BP-25193 / / / [null] / 577.810 / C24H47N5O7SSi
Broadpharm / Biotin-PEG-Silane MW 3400 / 100mg / 627958168 / BP-25193 / / / [null] / 577.810 / C24H47N5O7SSi
Medchemexpress LLC Ald-Ph-amido-C2-PEG3-azide | 1807540-88-0 | MFCD28155209 | 98.9% | 350.37 g/mol | C16H22N4O5 | 5 MG
Ald-Ph-amido-C2-PEG3-azide is a PEG-based PROTAC linker and click chemistry reagent bearing an azide functional group. It enables bioconjugation and PROTAC assembly via copper-catalyzed azide-alkyne cycloaddition (CuAAC) or strain-promoted azide-alkyne cycloaddition (SPAAC), and provides a soluble, flexible PEG spacer for linker construction.
- Contains an azide functional group for click chemistry.
- Compatible with CuAAC and SPAAC conjugation methods.
- PEG3 spacer improves solubility and linker flexibility.
- High purity suitable for research applications (>98%).
- Available in small milligram pack sizes for discovery work.
- Molecular weight 350.37 g/mol; formula C16H22N4O5.
Medchemexpress LLC Methyltetrazine-PEG8-acid | 2183440-33-5 | MFCD31580146 | 99.0% | C28H44N4O11 | 10MG
Methyltetrazine-PEG8-acid is a PEG8-based linker bearing a methyltetrazine moiety and a terminal carboxylic acid. It is formulated for bioorthogonal tetrazine ligation and conventional amide-coupling chemistries, enabling synthesis of PROTACs, bioconjugates, and labeled probes. The PEG8 spacer improves solubility and reduces steric interference in conjugation reactions.
- Methyltetrazine warhead enables rapid, selective tetrazine ligation
- PEG8 spacer improves aqueous solubility and reduces steric hindrance
- Terminal carboxylic acid is compatible with standard amide coupling
- High purity supports reproducible synthetic workflows
- Supplied in small-scale quantities suitable for research use
Research Products International Corp PEG 8000, 25 KG
Ultrapure white crystals for molecular biology applications such as precipitation of DNA, nucleic acids, hybridization and fusion of mammalian cells.Melting Point: 55°-60°C
Medchemexpress LLC Tco-PEG5-maleimide | 00-00-0 | 99.5% | C28H45N3O10 | 10MG
TCO-PEG5-maleimide is a PEG-based PROTAC linker and click-chemistry reagent that combines a maleimide reactive group with a PEG5 spacer bearing a trans-cyclooctene (TCO) moiety. It is designed for efficient bioorthogonal conjugation and thiol-selective coupling in PROTAC synthesis and bioconjugation workflows, provided as a high-purity solid with recommended low-temperature storage for stability.
- Enables rapid bioorthogonal conjugation via TCO-tetrazine click chemistry.
- Maleimide group allows thiol-selective conjugation to cysteine residues or thiol-containing linkers.
- PEG5 spacer improves aqueous solubility and reduces steric hindrance.
- High chemical purity suitable for synthesis and analytical applications.
- Available in multiple small-scale package sizes for research use.
- Stable when stored dry at low temperature; in solution requires colder storage for extended stability.
Chemscene ChemScene | Boc-NH-PEG4-CH2CH2COOH | 250MG | CS-W020872 | 0.98 | 756525-91-4| MFCD07781254 | 365.42
ChemScene | Boc-NH-PEG4-CH2CH2COOH | 250MG | CS-W020872 | 0.98 | 756525-91-4| MFCD07781254 | 365.42