Protein Modification Reagents
Worthington Biochemical Corporation WORTHINGTON BIOCHEMICAL CORPORATION
NC3928492 COLLAGENASE TYPE IV
Medchemexpress LLC Endo-BCN-PEG3-maleimide | 2141976-33-0 | MFCD31811466 | 98.5% | C26H37N3O8 | 10MG
endo-BCN-PEG3-mal is a heterobifunctional PEG-based linker containing a strained bicyclononyne (BCN) moiety and a terminal maleimide. It is designed for bioconjugation workflows, enabling copper-free click chemistry with azides and selective thiol coupling, and is commonly used in linker assembly for targeted degrader and conjugate synthesis.
- Enables strain-promoted alkyne-azide cycloaddition (SPAAC) with azide partners.
- Provides a thiol-reactive maleimide for selective conjugation.
- Uses a PEG3 spacer to improve solubility and flexibility.
- Suitable for linker synthesis and bioconjugation applications.
- Supplied as an oil with high reported purity.
Medchemexpress LLC PC-biotin-PEG4-NHS carbonate | 2055198-03-1 | 97.0% | C35H50N6O14S | 10MG
PC-Biotin-PEG4-NHS carbonate is a PEG-based photocleavable biotinylation reagent bearing an NHS carbonate amine-reactive group. It is designed for use as a PROTAC linker or to introduce a light-cleavable biotin tag for biochemical conjugation, affinity capture, and downstream light-mediated release of labeled molecules.
- Photocleavable biotin enables light-controlled release of captured molecules.
- PEG4 spacer improves solubility and reduces steric hindrance in conjugates.
- NHS carbonate reacts with primary amines to form stable carbamate linkages.
- High reported purity supports use in synthesis and analytical workflows.
- Powder storage at -20°C and cold-solvent storage extend compound stability.
Medchemexpress LLC Mal-PEG4-propargyl | 1262681-30-0 | MFCD29041878 | 99.7% | C15H21NO6 | 10MG
Mal-PEG4-propargyl is a bifunctional PEG4 linker bearing a maleimide and a propargyl (alkyne) group. It is designed for use in bioconjugation and linker assembly, enabling thiol-maleimide coupling and copper-catalyzed azide-alkyne cycloaddition (CuAAC) to attach diverse ligands or linkers.
- Maleimide group enables rapid, selective thiol conjugation.
- Propargyl (alkyne) group supports CuAAC "click" reactions.
- PEG4 spacer improves solubility and reduces steric hindrance.
- Low molecular weight (311.33 g·mol⁻¹) for minimal steric impact.
- High supplied purity (99.7%) for reliable synthetic performance.
eMolecules 1835759-82-4 | t-Boc-Aminooxy-PEG3-acid | Broadpharm | MFCD29052175 | 337.369 | C14H27NO8 | 97.000 | CC(C)(C)OC(=O)NOCCOCCOCCOCCC(O)=O | 100mg | 296213224
t-Boc-Aminooxy-PEG3-acid | Broadpharm | 1835759-82-4 | MFCD29052175 | 337.369 | C14H27NO8 | 97.000 | CC(C)(C)OC(=O)NOCCOCCOCCOCCC(O)=O | 100mg | 296213224