Protein Modification Reagents
LIPOID LLC LIPOID PE 18:0/18:0 PEG 2000, PEGylated Phospholipid, 2000 Da, >99% purity, sodium salt, -20°C storage, soluble in ethanol at 5 mg/mL
LIPOID PE 18:0/18:0 PEG 2000, PEGylated Phospholipid, 2000 Da, >99% purity, sodium salt, -20°C storage, soluble in ethanol at 5 mg/mL
![eMolecules Broadpharm / Thalidomide-O-PEG4-Propargyl / 100mg / 490840986 / BP-24423 / 98.000 / 2098799-77-8 / [null] / 488.493 / C24H28N2O9](https://assets.fishersci.com/TFS-Assets/CCG/product-images/502481116.JPG-250.jpg)
eMolecules Broadpharm / Thalidomide-O-PEG4-Propargyl / 100mg / 490840986 / BP-24423 / 98.000 / 2098799-77-8 / [null] / 488.493 / C24H28N2O9
Broadpharm / Thalidomide-O-PEG4-Propargyl / 100mg / 490840986 / BP-24423 / 98.000 / 2098799-77-8 / [null] / 488.493 / C24H28N2O9
Cayman Chemical DBCO-NHS ester 250mg
An azido-reactive click-chemistry reagent; has been conjugated to various anticancer agents for targeting azido-labeled cancer cells in mice
eMolecules m-PEG12-acid | 125220-94-2 | 1G | Purity: 98%
Broadpharm | m-PEG12-acid | 1G | 125220-94-2 | MFCD19382360 | MW:55.845
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eMolecules TCO-PEG4-NHS ester | 1613439-69-2 | 100MG | Purity: 95%
Broadpharm | TCO-PEG4-NHS ester | 100MG | 1613439-69-2 | MFCD18253569 | MW:487.66
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eMolecules Methyltetrazine-PEG5-triethoxysilane | 2353410-01-0 | | 250mg
Broadpharm | Methyltetrazine-PEG5-triethoxysilane | 250mg | 550804548 | BP-24141 | 98.000 | 2353410-01-0 | | 639.822 | C29H49N5O9Si
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LAYSAN BIO INC Thiol-PEG-Thiol, 3400 Da, 5 g, Linear, Homobifunctional, Powder, Highly soluble in water
LAYSAN BIO INC's Thiol-PEG-Thiol (SH-PEG-SH) is a high-purity, homobifunctional polyethylene glycol derivative with thiol groups, designed for efficient conjugation of biomolecules. This product offers excellent water solubility and biocompatibility, making it suitable for various biological applications. Its thiol reactivity allows participation in diverse chemical reactions, enhancing the stability and functionality of proteins in drug delivery and diagnostic assays.
- High purity and biocompatibility
- Efficient conjugation of biomolecules
- Excellent water solubility
- Thiol groups for versatile chemical reactivity
- Enhances protein stability and half-life
- Suitable for drug delivery systems and diagnostics
- Packed in 5 g for convenience
- Store at -20°C for optimal longevity
Medchemexpress LLC 3H-indolium di-sulfo Cy5 alkyne sodium salt | 1617497-19-4 | 99.0% | 701.83 | C35H40N3NaO7S2 | 10 MG
DiSulfo-Cy5 alkyne is a di-sulfonated Cy5-family fluorescent dye functionalized with a terminal alkyne for bioorthogonal click chemistry. It is water-soluble and intended for covalent conjugation to azide-bearing biomolecules via copper-catalyzed azide-alkyne cycloaddition (CuAAC), enabling fluorescent labeling for imaging and detection in biochemical assays.
- Water-soluble, di-sulfonated Cy5 fluorophore.
- Terminal alkyne for copper-catalyzed azide-alkyne click chemistry.
- Suitable for labeling proteins, nucleic acids, and small molecules.
- High purity (~99.0%) with characterized molecular weight.
- Supplied as a 10 MG vial for laboratory use.
- Molecular formula C35H40N3NaO7S2 and molecular weight 701.83.
![eMolecules Broadpharm / Methyltetrazine-PEG6-DBCO / 25mg / 698442875 / BP-25741 / 97.000 / / [null] / 738.842 / C40H46N6O8](https://assets.fishersci.com/TFS-Assets/CCG/product-images/502499303.JPG-250.jpg)
eMolecules Broadpharm / Methyltetrazine-PEG6-DBCO / 25mg / 698442875 / BP-25741 / 97.000 / / [null] / 738.842 / C40H46N6O8
Broadpharm / Methyltetrazine-PEG6-DBCO / 25mg / 698442875 / BP-25741 / 97.000 / / [null] / 738.842 / C40H46N6O8
eMolecules DBCO-PEG12-NHS ester | Broadpharm | 2093934-94-0 | | 1002.121 | C50H71N3O18 | 0.000 | O=C(CCC(=O)N1Cc2ccccc2C#Cc2ccccc12)NCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCC(=O)ON1C(=O)CCC1=O | 100mg | 433947042
DBCO-PEG12-NHS ester | Broadpharm | 2093934-94-0 | | 1002.121 | C50H71N3O18 | 0.000 | O=C(CCC(=O)N1Cc2ccccc2C#Cc2ccccc12)NCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCC(=O)ON1C(=O)CCC1=O | 100mg | 433947042
Medchemexpress LLC Dope-peg-azide | 99.6% | 1000 (average) | 5 MG
DOPE-PEG-Azide (MW 1000) is a DOPE-based phospholipid functionalized with a polyethylene glycol (PEG) chain terminating in an azide group. The azide handle enables bioorthogonal click chemistry for conjugation and surface modification of liposomes, lipid nanoparticles, and other lipid-based formulations. The material is polydisperse with an average PEG molecular weight of 1000 and is supplied for research use.
- Provides azide functional group for copper-catalyzed or copper-free click chemistry.
- Average PEG molecular weight 1000 (polydisperse).
- High purity suitable for formulation and bioconjugation (purity listed as 99.62%).
- Suitable for liposome and lipid nanoparticle functionalization.
- Available in small pack sizes for screening and method development.
- Store at -20 °C in pure form.
Medchemexpress LLC Gly-gly-gly-PEG4-azide | 3070260-22-6 | 99.8% | 433.46 g/mol | C16H31N7O7 | 50 MG
Gly-gly-gly-PEG4-azide is a PEGylated tri-glycine linker bearing a terminal azide functional group used for bioconjugation and click chemistry. It facilitates attachment of payloads to peptides, proteins, or small molecules via copper-catalyzed azide-alkyne cycloaddition (CuAAC) or strain-promoted azide-alkyne cycloaddition (SPAAC).
- Enables CuAAC and SPAAC bioconjugation reactions
- High purity: 99.8% as supplied
- Molecular weight: 433.46 g/mol; formula C16H31N7O7
- Typical applications: ADC linker chemistry and payload attachment
- Recommended storage: -20 °C under inert gas; in solution: -80 °C (6 months)
- Available as a 50 MG vial
Medchemexpress LLC 4-Arm PEG-Azide MW 50mg
4-Arm PEG-Azide (MW 40000) (4-Arm PEG-N3 (MW 40000)) is a multi-arm PEG derivative with an azide group at each end of four arms attached to a pentaerythritol core[1]
Medchemexpress LLC HY-103599 100mg Medchemexpress, (S,R,S)-AHPC-PEG2-N3 CAS:2010159-45-0 Purity:>98%
Medchemexpress, HY-103599 100mg (S,R,S)-AHPC-PEG2-N3 CAS:2010159-45-0 (S,R,S)-AHPC-PEG2-N3 is a synthesized E3 ligase ligand-linker conjugate that incorporates the (S,R,S)-AHPC based VHL ligand and 2-unit PEG linker used in PROTAC technology. Purity:>98% Medchemexpress has over 10000 novel life-science reagents, reference compounds, APIs and natural compounds for laboratory and scientific use. Other quantity can also be offered.
Medchemexpress LLC M-PEG15-NHS ester | 98.0% | 875.99 g/mol | C39H73NO20 | 5 MG
m-PEG15-NHS ester is a polyethylene glycol (PEG) linker bearing an N-hydroxysuccinimide (NHS) ester for amine-specific conjugation. It provides a PEG15 spacer to increase solubility and flexibility during bioconjugation and linker assembly, and is supplied with defined purity and molecular weight for research applications.
- Amine-reactive NHS ester for efficient coupling to primary amines.
- PEG15 spacer to enhance solubility and reduce steric hindrance.
- High purity suitable for research-grade bioconjugation.
- Stable when stored sealed at -20°C to preserve activity.
- Designed for linker synthesis and PROTAC construction workflows.