Protein Modification Reagents
Broadpharm NHS ESTER-PEG4-VAL-CIT-PAB-MMAE | MFCD34178780 | 10MG
NHS ESTER-PEG4-VAL-CIT-PAB-MMAE | MFCD34178780 | 10MG
Medchemexpress LLC Propargyl-PEG4-NHS ester | 1428629-70-2 | 97.0% | 357.36 g·mol⁻¹ | C16H23NO8 | 100 MG
Propargyl-PEG4-NHS ester is a PEG4 linker with a terminal propargyl (alkyne) group and an N-hydroxysuccinimide (NHS) ester, designed for bioconjugation via amine coupling and click chemistry.
- Noncleavable four-unit PEG linker for spacer and solubility
- Terminal propargyl group enables copper-catalyzed azide-alkyne cycloaddition
- NHS ester provides rapid and efficient coupling to primary amines
- High purity suitable for research applications
- Molecular weight approximately 357.36 g·mol⁻¹
- Available in small research-scale package sizes
Medchemexpress LLC Mal-PEG36-NHS ester | 00-00-0 | 95.0% | C86H159N3O43 | 10MG
Mal-PEG36-NHS ester is a polyethylene glycol (PEG)-based bifunctional linker bearing a maleimide and an N-hydroxysuccinimide (NHS) activated ester. Supplied as a research-use solid, it facilitates thiol and amine conjugation for PROTAC assembly and other bioconjugation chemistries.
- Enables thiol coupling via maleimide and amine coupling via NHS ester.
- PEG36 spacer provides hydrophilicity and flexible linker length.
- High molecular weight (≈1,923 Da) for extended linker reach.
- Purity approximately 95.0% as provided by manufacturer.
- Soluble in DMSO at ~62.5 mg/mL; documented in vivo formulations exist.
- Recommended storage: -20°C for solid; low-temperature storage for solutions to preserve stability.
- Intended for research use only; not for clinical applications.
Medchemexpress LLC Amino-PEG6-amido-bis-PEG5-N3 | 1147.31 | C48H94N10O21 | 25 MG
A cleavable, PEG-based linker containing an azide functional group and a terminal amino group for bioconjugation. Designed as an 11-unit PEG spacer, it provides hydrophilicity and reactive handles for click chemistry and antibody-drug conjugate synthesis.
- Cleavable 11-unit PEG linker providing hydrophilic spacer.
- Contains an azide group for copper-catalyzed and strain-promoted click reactions.
- Terminal amino group enables further conjugation chemistry.
- Suitable for antibody-drug conjugate and bioconjugation applications.
- Available in small lab pack sizes for research use.
![eMolecules Methyltetrazine-PEG4-STP Ester | Broadpharm |686.560 | C26H27F4N4NaO10S | 0.000 | [Na+].Cc1nnc(nn1)-c1ccc(OCCOCCOCCOCCOCCC(=O)Oc2c(F)c(F)c(c(F)c2F)S([O-])(=O)=O)cc1 | 10mg | 795362051](https://assets.fishersci.com/TFS-Assets/CCG/product-images/502472604.JPG-250.jpg)
eMolecules Methyltetrazine-PEG4-STP Ester | Broadpharm |686.560 | C26H27F4N4NaO10S | 0.000 | [Na+].Cc1nnc(nn1)-c1ccc(OCCOCCOCCOCCOCCC(=O)Oc2c(F)c(F)c(c(F)c2F)S([O-])(=O)=O)cc1 | 10mg | 795362051
Methyltetrazine-PEG4-STP Ester | Broadpharm |686.560 | C26H27F4N4NaO10S | 0.000 | [Na+].Cc1nnc(nn1)-c1ccc(OCCOCCOCCOCCOCCC(=O)Oc2c(F)c(F)c(c(F)c2F)S([O-])(=O)=O)cc1 | 10mg | 795362051
Medchemexpress LLC Dspe-PEG-NHS (N-hydroxysuccinimide ester of DSPE-PEG) | 98.0% | 2000 (average) | 100 MG
DSPE-PEG-NHS (average molecular weight 2000) is an NHS-activated PEGylated phospholipid used to introduce polyethylene glycol chains onto lipid-based nanoparticles and to conjugate amine-containing ligands via formation of stable amide bonds. It is commonly applied in liposome and micelle formulation, surface PEGylation, and ligand attachment for targeted delivery. Typical purity is 98%.
- NHS ester for efficient amine coupling reactions
- Average PEG molecular weight 2000 for steric stabilization
- Compatible with liposome and micelle formulation workflows
- Enables surface PEGylation and conjugation of targeting ligands
- High purity suitable for research applications
- Available as a dry powder for convenient storage and handling
Medchemexpress LLC 2,5-dioxopyrrolidin-1-yl 1-(4-(6-methyl-1,2,4,5-tetrazin-3-yl)phenyl)-PEG4-SS-NHS ester | 95.0% | 737.84 | C31H43N7O10S2 | 10 MG
Methyltetrazine-PEG4-SS-NHS ester is a cleavable PEG4-based methyltetrazine-functionalized N-hydroxysuccinimide ester for bioconjugation and click-chemistry applications. It provides a tetrazine reactive handle for inverse electron-demand Diels-Alder labeling, and contains a disulfide cleavable spacer and PEG4 linker to improve solubility and enable reductive release.
- Purity 95.0% (NMR).
- Pink to red oil appearance.
- Molecular weight 737.84.
- Chemical formula C31H43N7O10S2.
- Contains a disulfide cleavable linker and a PEG4 spacer.
- Provides a tetrazine handle for IEDDA bioconjugation.
- Storage: pure form at -20°C (stable for 3 years); in solvent -80°C for 6 months, -20°C for 1 month.
- Tested by 1H NMR; for research use only.
eMolecules 2601437-72-1 | SPDP-PEG12-NHS ester | Broadpharm | MFCD13185005 | 912.070 | C39H65N3O17S2 | 95.000 | O=C(CCSSc1ccccn1)NCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCC(=O)ON1C(=O)CCC1=O | 100mg | 229582557
SPDP-PEG12-NHS ester | Broadpharm | 2601437-72-1 | MFCD13185005 | 912.070 | C39H65N3O17S2 | 95.000 | O=C(CCSSc1ccccn1)NCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCC(=O)ON1C(=O)CCC1=O | 100mg | 229582557
Formumax Scientific Inc DOXOVES-PEGYL LD HCL 2ML, 4MG
Doxoves® - PEGylated Liposomal Doxorubicin HCl (2.0mL, 4.0mg/mL)Doxorubicin HCl is loaded into PEGylated liposomes composed of HSPC/CHOL/mPEG2000-DSPE (56.2:38.5:5.3 mol/mol) with ammonium gradient by the active loading approach. It is comparable to the commercial product DOXIL®. The liposomes are prepared to very high quality with consistent lot-lot characteristics. Narrow particle size distribution and high drug encapsulation efficiency. Note the high drug concentration (4mg/mL compared to 2 mg/mL for DOXIL®) allows the researchers to perform experiments at higher concentration/doses.Control liposomes for this product: F30204B-C-2 (please inquire)Product For Research only and NOT for Human Use