Protein Modification Reagents
Medchemexpress LLC Mc-peg2-va-pab-exatecan | 2845165-13-9 | 99.6% | 994.03 | C51H56FN7O13 | 10 MG
MC-PEG2-VA-PAB-Exatecan is an exatecan-based drug-linker conjugate designed for antibody-drug conjugate (ADC) research. It links the camptothecin-derived cytotoxic payload exatecan to a cleavable PEG2-Val-Cit-PAB linker to permit targeted intracellular release of the payload during ADC development.
- Exatecan payload confers potent topoisomerase I inhibition.
- Cleavable Val-Cit-PAB linker enables enzyme-triggered release inside target cells.
- PEG2 spacer improves solubility and conjugation flexibility.
- High reported purity supports reproducible research results.
- Available in mg-scale quantities suitable for ADC synthesis workflows.
Medchemexpress LLC m-PEG-DSPE (sodium) | 95.0% | 3000 (average) | C45H88NO11P | 1 G
m-PEG-DSPE sodium (MW 3000) is a PEGylated phospholipid supplied as a white to off-white solid. The sodium salt of methoxy polyethylene glycol-distearoylphosphoethanolamine (average PEG MW 3,000 Da), it is used to stabilize liposomes and lipid nanoparticles, provide steric stabilization, and modify particle surfaces for drug delivery research.
- Average molecular weight 3000 Da.
- Purity 95.0%.
- White to off-white solid form.
- Suitable for liposome and lipid nanoparticle formulation.
- Provides steric stabilization and surface PEGylation.
- Storage: -20°C sealed; in solvent: -80°C up to 6 months.
- Available in laboratory pack sizes including 1 g.
eMolecules Bis-PEG1-acid | Broadpharm | 5961-83-1 | MFCD06208032 | 162.141 | C6H10O5 | 0.000 | OC(=O)CCOCCC(O)=O | 250mg | 279709653
Bis-PEG1-acid | Broadpharm | 5961-83-1 | MFCD06208032 | 162.141 | C6H10O5 | 0.000 | OC(=O)CCOCCC(O)=O | 250mg | 279709653
![eMolecules Broadpharm / Azide-PEG3-MMAF / 1mg / 718091515 / BP-27082 / / / [null] / 961.212 / C48H80N8O12](https://assets.fishersci.com/TFS-Assets/CCG/product-images/502510613.JPG-250.jpg)
eMolecules Broadpharm / Azide-PEG3-MMAF / 1mg / 718091515 / BP-27082 / / / [null] / 961.212 / C48H80N8O12
Broadpharm / Azide-PEG3-MMAF / 1mg / 718091515 / BP-27082 / / / [null] / 961.212 / C48H80N8O12
Medchemexpress LLC Biotin-PEG8-azide | 2363756-34-5 | >98.0% | C32H59N7O11S | 25 MG
Biotin-PEG8-azide is a biotinylated polyethylene glycol (PEG) linker bearing an azide functional group for click chemistry. The PEG8 spacer improves solubility and reduces steric hindrance; the azide enables covalent coupling to alkyne-containing molecules via azide-alkyne cycloaddition, and the biotin moiety allows high-affinity capture and detection with streptavidin/avidin systems. Intended for research use in bioconjugation and surface modification applications.
- Enables Cu(I)-catalyzed or strain-promoted azide-alkyne cycloaddition.
- Provides biotin tag for streptavidin/avidin capture and detection.
- PEG8 spacer increases solubility and reduces steric interference.
- High purity suitable for research bioconjugation workflows.
- Stable as a powder at -20°C for long-term storage.
Medchemexpress LLC AgAuSe-PEG-NH2 (1000 nm) | 250 UL
AgAuSe-PEG-NH2 (1000 nm) is a fluorescent quantum dot that emits fluorescence in the near-infrared II region, with an emission peak reaching 1000 nm that can be used in bioimaging.
- Emits fluorescence in the near-infrared II region
- Emission peak reaching 1000 nm
- Useful for bioimaging
LAB ALLEY Lab Alley Polyethylene Glycol (PEG) 400 Food Grade (FCC) Halal
Polyethylene Glycol is synthesized by ring-opening polymerization of ethylene oxide. This synthesis process gives PEG a range of molecular weights and distributions from 300 grams per mole to 10000000 grams per mole. PEG 400 has a molecular weight of 400 and is a clear colorless viscous liquid. Polyethylene Glycol is colorless inert odorless and non-volatile. PEG is biocompatible (it will not damage tissues or cells) hydrophilic dissolves readily in water without changing the color odor or taste and is nontoxic. Due to the high purity of Polyethylene Glycol 400 it is certified by the United States Pharmacopeia (USP) grade and the Food Chemicals Codex (FCC) grade.
Medchemexpress LLC Methyltetrazine-PEG8-PFP ester | 2353409-49-9 | MFCD31811432 | 98.1% | C34H43F5N4O11 | 10MG
Methyltetrazine-PEG8-PFP ester is a PEG8-based linker featuring a methyltetrazine reactive group and a pentafluorophenyl (PFP) activated ester. Supplied as a powder for research use, it is intended for bioconjugation and PROTAC linker synthesis, enabling rapid tetrazine ligation and reliable amine coupling. Store protected from light at -20°C; in solution, store at -80°C for long-term stability.
Medchemexpress LLC Dbco-(peg2-vc-pab-mmae)2 | 2259318-55-1 | 99.2% | 2835.50 g·mol⁻¹ | C149H224N22O32 | 10 MG
DBCO-(PEG2-VC-PAB-MMAE)2 is a click-chemistry compatible ADC linker dimer that carries monomethyl auristatin E (MMAE) payloads on a cleavable Val-Cit-PAB spacer and features a DBCO handle for strain-promoted alkyne-azide cycloaddition (SPAAC). It is used for bioconjugation and synthesis of antibody-drug conjugates, enabling controlled intracellular release of MMAE via protease cleavage.
- Enables strain-promoted alkyne-azide cycloaddition for copper-free bioconjugation.
- Includes a Val-Cit-PAB protease-cleavable linker for intracellular payload release.
- Delivers MMAE warheads for potent tubulin inhibition after release.
- Available as a powder with multiple package sizes for research-scale synthesis.
- High supplied purity supports reliable conjugation and analytical characterization.
Medchemexpress LLC Benzyl-PEG5-Ots 1g
Benzyl-PEG5-Ots is a PEG-based PROTAC linker can be used in the synthesis of PROTACs
Avanti Polar Lipids 18:0 PEG2000 PE Chloroform | 474922-77-5 | 200mg
18:0 PEG2000 PE Chloroform | Purity: 99% | 474922-77-5 | 200mg
Cayman Chemical CLS-MPEG 2000 50mg
A PEGylated form of cholesterol; has been used in the synthesis of liposomes for targeted drug delivery
Medchemexpress LLC Biotin-PEG2-acid | 1365655-89-5 | MFCD22056305 | ≥97.0% | 403.49 g·mol⁻¹ | C17H29N3O6S | 250 MG
Biotin-PEG2-acid is a biotinylated polyethylene glycol linker with a terminal carboxylic acid, used as a non-cleavable ADC and PROTAC linker for bioconjugation, affinity labeling, and linker synthesis. It is supplied in small laboratory pack sizes for conjugation workflows.
- Biotinylated PEG linker with a terminal carboxylic acid for conjugation.
- Non-cleavable two-unit PEG spacer suited for ADC and PROTAC syntheses.
- High purity (≥97.0%) for reliable conjugation performance.
- Molecular weight 403.49 g·mol⁻¹; formula C17H29N3O6S.
- Available in small-scale quantities such as 250 MG.
- Store protected from light under argon at -20°C; in solvent store at -80°C for long-term.
eMolecules endo-BCN-PEG3-amine | | | 500mg
Broadpharm | endo-BCN-PEG3-amine | 500mg | 528284354 | BP-24510 | 98.000 | | | 368.474 | C19H32N2O5
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