Protein Modification Reagents
eMolecules Cbz-N-amido-PEG1-t-butyl ester | 1295644-51-7 | MFCD30182045 | 1g
Broadpharm | Cbz-N-amido-PEG1-t-butyl ester | 1g | 309208972 | BP-23256 | 97.000 | 1295644-51-7 | MFCD30182045 | 323.389 | C17H25NO5
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Active Motif Sortag-IT™ 3X DBCO Click Labeling Kit, 3 x 100 µg
Sortag-IT™ Labeling Kits are designed for site-specific labeling of Active Motif's highly specific AbFlex® recombinant antibodies (rAb) via the Sortase tag recognition sequence (LPXTG) that is incorporated into the heavy chains of each AbFlex antibody. Directly conjugate fluorophores, enzymes (HRP, AP), biotin, peptides, DNA, carbohydrates, or other labels to the terminal end of the heavy chain to ensure the antigen binding site remains available for target recognition.
eMolecules Broadpharm / t-BuO2C-PEG4-SS-PEG4-CO2tBu / 250mg / 282987761 / BP-22787 / 98.000 / / MFCD28950761 / 674.900 / C30H58O12S2
Broadpharm / t-BuO2C-PEG4-SS-PEG4-CO2tBu / 250mg / 282987761 / BP-22787 / 98.000 / / MFCD28950761 / 674.900 / C30H58O12S2
Medchemexpress LLC DSPE-biotin | 133695-76-8 | MFCD34561787 | 97.5% | 974.36 | C51H96N3O10PS | 10 MG
DSPE-Biotin is a biotinylated phospholipid used to introduce biotin functionality into liposomes, lipid bilayers, and other lipid-based formulations for biochemical research and bioconjugation. It facilitates specific capture, labeling, and immobilization through high-affinity streptavidin/avidin interactions.
- Provides biotin functionality for liposomes and lipid bilayers.
- Enables high-affinity binding to streptavidin and avidin.
- Suitable for liposome formulation and surface immobilization applications.
- Soluble in DMSO; ultrasonic warming improves solubility.
- High purity for research use; handle and store protected from light.
- Stable when stored at -20°C for long-term storage.
eMolecules DNP-PEG4-alcohol | 1807520-99-5 | MFCD28385460 | 500mg
Broadpharm | DNP-PEG4-alcohol | 500mg | 298819395 | BP-22618 | | 1807520-99-5 | MFCD28385460 | 359.335 | C14H21N3O8
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![eMolecules Broadpharm / 14-(Azide-PEG5-ethylcarbamoyl)tridecanoic t-butyl ester / 100mg / 784454986 / BP-29796 / 95.000 / / [null] / 602.814 / C30H58N4O8](https://assets.fishersci.com/TFS-Assets/CCG/product-images/502473327.JPG-250.jpg)
eMolecules Broadpharm / 14-(Azide-PEG5-ethylcarbamoyl)tridecanoic t-butyl ester / 100mg / 784454986 / BP-29796 / 95.000 / / [null] / 602.814 / C30H58N4O8
Broadpharm / 14-(Azide-PEG5-ethylcarbamoyl)tridecanoic t-butyl ester / 100mg / 784454986 / BP-29796 / 95.000 / / [null] / 602.814 / C30H58N4O8
![eMolecules Medchem Express / Biotin-PEG4-Amide-C6-Azide / 10mg / 600899959 / HY-140914 / / 1006592-62-6 / [null] / 615.790 / C27H49N7O7S](https://assets.fishersci.com/TFS-Assets/CCG/product-images/502456929.PNG-250.jpg)
eMolecules Medchem Express / Biotin-PEG4-Amide-C6-Azide / 10mg / 600899959 / HY-140914 / / 1006592-62-6 / [null] / 615.790 / C27H49N7O7S
Medchem Express / Biotin-PEG4-Amide-C6-Azide / 10mg / 600899959 / HY-140914 / / 1006592-62-6 / [null] / 615.790 / C27H49N7O7S
Medchemexpress LLC Methyltetrazine-PEG24-NHS ester | 00-00-0 | 99.3% | C64H111N5O29 | 10MG
Methyltetrazine-PEG24-NHS ester is a PEG24 linker bearing a methyltetrazine reactive moiety and an N-hydroxysuccinimide (NHS) activated ester. Provided as a dry research reagent, it is designed for bioconjugation and PROTAC linker synthesis, enabling rapid bioorthogonal ligation to trans-cyclooctene (TCO) derivatives and stable amide bond formation with primary amines. The long PEG24 spacer enhances aqueous solubility and provides flexibility between conjugated components.
- Enables rapid inverse electron-demand Diels-Alder (IEDDA) conjugation with TCO reagents.
- Provides an NHS ester for efficient coupling to primary amines.
- PEG24 spacer increases aqueous solubility and linker flexibility.
- High purity suitable for research applications.
- Supplied in mg-scale packages for small-scale conjugations.
- Intended for research use only and not for human therapeutic use.
Medchemexpress LLC 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-PEG2000 N-hydroxysuccinimide ester | 98.0% | 2000 (average) | 5 MG
DSPE-PEG-NHS is a PEGylated phospholipid with an N-hydroxysuccinimide (NHS) activated ester at the PEG terminus. It acts as an amine-reactive linker for conjugating biomolecules to lipid assemblies and is commonly used to functionalize liposome surfaces and prepare targeted lipid nanoparticles. The material is a white to off-white solid with high purity and an average PEG molecular weight of 2000 Da.
- Provides amine-reactive NHS ester for efficient conjugation.
- Facilitates surface modification of liposomes and lipid nanoparticles.
- Polyethylene glycol spacer improves circulation and steric stability.
- White to off-white solid suitable for laboratory handling and storage.
- High purity for reproducible research results.
- Average molecular weight 2000 Da compatible with PEG2000 applications.
![eMolecules Broadpharm / DSPE-PEG-CH2COOH MW 3400 / 500mg / 713700078 / BP-28185 / / 2665069-75-8 / [null] / 894.178 / C46H88NO13P](https://assets.fishersci.com/TFS-Assets/CCG/product-images/502475004.JPG-250.jpg)
eMolecules Broadpharm / DSPE-PEG-CH2COOH MW 3400 / 500mg / 713700078 / BP-28185 / / 2665069-75-8 / [null] / 894.178 / C46H88NO13P
Broadpharm / DSPE-PEG-CH2COOH MW 3400 / 500mg / 713700078 / BP-28185 / / 2665069-75-8 / [null] / 894.178 / C46H88NO13P
Medchemexpress LLC Biotin-PEG4-alcohol | 1217609-84-1 | 98.0% | C18H33N3O6S | 10MG
Biotin-PEG4-OH is a biotinylated polyethylene glycol linker with a terminal hydroxyl group, designed for use as a flexible spacer and affinity tag in chemical biology and PROTAC synthesis. The PEG4 spacer increases solubility and reduces steric hindrance while enabling conjugation to biomolecules and small-molecule ligands.