Protein Modification Reagents
![eMolecules Broadpharm / HO-PEG-Fluor-647 TEA salts MW 2000 / 5mg / 798871047 / BP-40408 / / / [null] / 1047.230 / C44H62N4O17S4](https://assets.fishersci.com/TFS-Assets/CCG/product-images/502472793.JPG-250.jpg)
eMolecules Broadpharm / HO-PEG-Fluor-647 TEA salts MW 2000 / 5mg / 798871047 / BP-40408 / / / [null] / 1047.230 / C44H62N4O17S4
Broadpharm / HO-PEG-Fluor-647 TEA salts MW 2000 / 5mg / 798871047 / BP-40408 / / / [null] / 1047.230 / C44H62N4O17S4
Medchemexpress LLC DSPE-PEG5000 maleimide ammonium salt | 474922-22-0 | 98.4% | (C2H4O)nC51H92N1O13P.H3N | 10MG
DSPE-PEG5000-Mal is a lipid-polyethylene glycol conjugate bearing a terminal maleimide group for selective thiol coupling. It integrates into lipid bilayers to functionalize liposomes and lipid nanoparticles, while the PEG5000 chain provides steric stabilization and extended circulation in biological media.
- Maleimide-functional group enables selective thiol conjugation.
- PEG5000 chain provides steric stabilization and prolongs circulation time.
- Phospholipid anchor integrates into lipid bilayers and nanocarriers.
- High reported purity supports reproducible formulation performance.
- White to off-white solid suitable for analytical handling and storage.
Medchemexpress LLC Dnp-peg4-dbco | 2149585-17-9 | MFCD31654037 | 97.0% | C35H39N5O10 | 10MG
DNP-PEG4-DBCO is a PEG-based PROTAC linker and click-chemistry reagent that combines a dinitrophenyl (DNP) moiety with a dibenzocyclooctyne (DBCO) group. The DBCO enables strain-promoted alkyne-azide cycloaddition (SPAAC) with azide-containing molecules, supporting efficient bioconjugation and PROTAC assembly.
- Contains DNP and DBCO functional groups for dual reactivity.
- Enables copper-free SPAAC click chemistry with azide partners.
- Suitable for PROTAC linker synthesis and bioconjugation workflows.
- High purity (97.0%) for reliable analytical and preparative use.
- Stable under recommended storage conditions for extended shelf life.
Medchemexpress LLC Propargyl-PEG6-N3 | 1198080-03-3 | MFCD31561110 | >98.0% | C15H27N3O6 | 10MG
Propargyl-PEG6-N3 is a PEG-based linker that contains an azide and a terminal propargyl (alkyne) group, designed for click chemistry and bioconjugation. It is used as a spacer in PROTAC synthesis and in the modular assembly of labeled biomolecules, and should be stored per supplier recommendations.
![eMolecules Broadpharm / DBCO-PEG-Silane MW 1000 / 100mg / 649281217 / BP-25862 / / / [null] / 652.864 / C34H48N4O7Si](https://assets.fishersci.com/TFS-Assets/CCG/product-images/502480345.JPG-250.jpg)
eMolecules Broadpharm / DBCO-PEG-Silane MW 1000 / 100mg / 649281217 / BP-25862 / / / [null] / 652.864 / C34H48N4O7Si
Broadpharm / DBCO-PEG-Silane MW 1000 / 100mg / 649281217 / BP-25862 / / / [null] / 652.864 / C34H48N4O7Si
![Medchemexpress LLC (2,5-dioxopyrrolidin-1-yl) 3-[2-[2-[2-[2-[4-(6-methyl-1,2,4,5-tetrazin-3-yl)phenoxy]ethoxy]ethoxy]ethoxy]... | 1802907-92-1 | MFCD28334559 | 97.0% | C24H31N5O9 | 10MG](https://assets.fishersci.com/TFS-Assets/CCG/product-images/5000258923.png-250.jpg)
Medchemexpress LLC (2,5-dioxopyrrolidin-1-yl) 3-[2-[2-[2-[2-[4-(6-methyl-1,2,4,5-tetrazin-3-yl)phenoxy]ethoxy]ethoxy]ethoxy]... | 1802907-92-1 | MFCD28334559 | 97.0% | C24H31N5O9 | 10MG
Methyltetrazine-PEG5-NHS ester is a PEG5-based linker bearing a methyltetrazine group and an N-hydroxysuccinimide (NHS) ester. It enables rapid bioorthogonal labeling via inverse-electron-demand Diels-Alder reactions with trans-cyclooctene derivatives and provides an activated ester for amine coupling; the PEG5 spacer improves aqueous solubility and spacing in conjugates. Molecular formula C24H31N5O9, MW 533.53 g·mol⁻¹.
- Enables fast bioorthogonal conjugation via inverse-electron-demand Diels-Alder.
- Provides an activated NHS ester for efficient amine coupling.
- Peg5 spacer increases solubility and reduces steric hindrance.
- Suitable for synthesis of linkers, bioconjugates, and PROTACs.
- Supplied at high purity for research applications.
Medchemexpress LLC (S,R,S)-AHPC-PEG2-NH2 dihydrochloride | 2341796-76-5 | 648.64 g/mol | C28H43Cl2N5O6S | 100 MG
(S,R,S)-AHPC-PEG2-NH2 dihydrochloride is a VHL E3 ligase ligand-linker conjugate used as a building block in PROTAC synthesis. It combines an (S,R,S)-configured AHPC VHL ligand with a two-unit PEG linker terminating in a primary amine and is supplied as a dihydrochloride salt in powder form for research use.
- VHL ligand-linker conjugate for PROTAC assembly.
- Two-unit PEG linker with terminal primary amine.
- Dihydrochloride salt stable as a sealed powder.
- Supplied in small milligram quantities for medicinal chemistry workflows.
- Suitable as a synthetic building block in degrader design.
ACROBiosystems HRV-3C Protease Cleavage Enzyme, GST Tag (active enzyme)
Recombinant Protein;5000U;The enzyme recognizes the cleavage site: Leu-Glu-Val-Leu-Phe-Gln-↓-Gly-Pro. ;HRV-3C Protease Cleavage Enzyme, GST Tag is a recombinant form of human rhinovirus (HRV) type 14 3C protease produced in Escherichia coli cells at ACRObiosystems. ;This protein carries a GST tag at the N-terminus. The protein has a calculated MW of 46.0 kDa. The protein migrates as 44-46 kDa under reducing (R) condition (SDS-PAGE).