Protein Modification Reagents
Medchemexpress LLC DSPE-NHS | 1383932-86-2 | MFCD34561791 | 95.0% | 945.21 g/mol | C49H89N2O13P | 5 MG
DSPE-NHS is an NHS-activated phospholipid reagent used for bioconjugation and liposome/nanocarrier preparation. It contains two hydrophobic stearoyl tails and an NHS ester that reacts with primary amines to form stable amide bonds; in aqueous solution it self-assembles into lipid bilayers and is commonly used to label antibodies and conjugate proteins.
- Reacts with primary amines to form stable amide linkages.
- Self-assembles into lipid bilayers in aqueous solution.
- Suitable for antibody labeling and protein conjugation.
- Solid form with practical storage recommendations for solvent and sealed conditions.
- Provided at high purity for research applications.
eMolecules 65883-12-7 | PEG5-Ms | Broadpharm | MFCD29042357 | 272.310 | C9H20O7S | 98.000 | CS(=O)(=O)OCCOCCOCCOCCO | 1g | 296213416
PEG5-Ms | Broadpharm | 65883-12-7 | MFCD29042357 | 272.310 | C9H20O7S | 98.000 | CS(=O)(=O)OCCOCCOCCOCCO | 1g | 296213416
eMolecules 525583-49-7 | Boc-Gly-amido-(CH2)3-PEG3-(CH2)3-amine | Broadpharm | MFCD31380402 | 377.482 | C17H35N3O6 | 95.000 | CC(C)(C)OC(=O)NCC(=O)NCCCOCCOCCOCCCN | 1g | 353441853
Boc-Gly-amido-(CH2)3-PEG3-(CH2)3-amine | Broadpharm | 525583-49-7 | MFCD31380402 | 377.482 | C17H35N3O6 | 95.000 | CC(C)(C)OC(=O)NCC(=O)NCCCOCCOCCOCCCN | 1g | 353441853
STA Pharmaceutical Fmoc-NH-PEG8-CH2COOH | 50 g | CAS 868594-52-9 | MDL MFCD27635163
Fmoc-NH-PEG8-CH2COOH is a Amino Acid reagent (Subcategory: PEG AA) sold by WuXi TIDES. Offered in 50 g. Store at 4 °C. SDS available for reference.
Specifications
- CAS: 868594-52-9
- MDL: MFCD27635163
- InChIKey: JRLUSGRARXJCNA-UHFFFAOYSA-N
- Molecular Weight: 649.734
- Molecular Formula: C33H47NO12
- Purity: ≥95%
- Container Type: 250 mL HDPE
- Pack Size: 50 g
- Net Weight: 50 g
- Gross Weight: 89.8 g
- Commodity Code: 29242970
- Country Of Origin: China
- IUPAC: 1-(9H-fluoren-9-yl)-3-oxo-2,7,10,13,16,19,22,25,28-nonaoxa-4-azatriacontan-30-oic acid
- SMILES: O=C(COCCOCCOCCOCCOCCOCCOCCOCCNC(OCC1C2=CC=CC=C2C3=CC=CC=C31)=O)O
Medchemexpress LLC Biotin-PEG4-TFP ester | 2985664-57-9 | MFCD27952880 | 98.2% | C27H37F4N3O8S | 10MG
Biotin-PEG4-TFP ester is a biotinylated PEG4 spacer terminated with a tetrafluorophenyl (TFP) activated ester, formulated for conjugation to primary amines in proteins, peptides, or small molecules. It enables rapid formation of stable amide bonds while providing a hydrophilic linker that reduces steric hindrance and improves solubility. The TFP activated ester offers greater hydrolytic stability than many NHS esters, supporting cleaner bioconjugation and linker assembly workflows.
- Activated TFP ester for efficient coupling to primary amines.
- Biotin tag for affinity capture and detection.
- PEG4 spacer improves solubility and reduces steric hindrance.
- Greater hydrolytic stability than many NHS esters, enabling cleaner conjugations.
- Suitable for protein, peptide, and small-molecule conjugation applications.
Medchemexpress LLC Dmg-PEG-NHS | 95.0% | 2000 Da | 10 MG
NHS-activated polyethylene glycol (PEG) linker terminated with a dimyristoyl glycerol (DMG) lipid moiety and an N-hydroxysuccinimide (NHS) ester. Average molecular weight ~2,000 Da. Supplied as a white to off-white solid for research use; the NHS ester enables amine-reactive conjugation to proteins and other biomolecules and supports liposome and gene-delivery formulations.
- Enables efficient amine-reactive conjugation to proteins and peptides.
- Suitable for liposome formulation and surface PEGylation.
- Facilitates gene delivery and nucleic acid encapsulation.
- White to off-white solid, easy to handle and weigh.
- Stored as powder at -20°C for long-term stability; in-solution storage limited.
- High purity by NMR (95.0%), appropriate for research applications.
Medchemexpress LLC DSPE-PEG-biotin | 98.4% | 3,400 (average) | 50 MG
DSPE-PEG-Biotin is a PEGylated phospholipid conjugated to biotin for surface functionalization of liposomes, nanoparticles, and other amphiphilic assemblies. Its amphiphilic structure enables stable incorporation into lipid bilayers while presenting biotin for affinity capture and targeted delivery research.
- Average molecular weight 3,400.
- High purity (98.4%) for consistent experimental results.
- White powder form suitable for storage and handling.
- Provides a hydrophobic DSPE anchor and a hydrophilic PEG-biotin chain.
- Stable in powder form at -20°C; solutions require low-temperature storage.
- Available in small research quantities, such as 50 mg.
eMolecules 850090-10-7 | Tos-PEG6-t-Butyl ester | Broadpharm | MFCD22683305 | 520.630 | C24H40O10S | 95.000 | Cc1ccc(cc1)S(=O)(=O)OCCOCCOCCOCCOCCOCCC(=O)OC(C)(C)C | 250mg | 208940412
Tos-PEG6-t-Butyl ester | Broadpharm | 850090-10-7 | MFCD22683305 | 520.630 | C24H40O10S | 95.000 | Cc1ccc(cc1)S(=O)(=O)OCCOCCOCCOCCOCCOCCC(=O)OC(C)(C)C | 250mg | 208940412
Medchemexpress LLC Biotin-PEG11-SH | 1650579-23-9 | 98.0% | C34H65N3O13S2 | 100 MG
Biotin-PEG11-SH enables biotin labeling of protein. It is intended for research use only and is not sold to patients. This product appears as an off-white to light yellow solid with a molecular weight of 788.02. It can be stored at -20°C under nitrogen or at -80°C for 6 months when in solvent.
- Enables biotin labeling of protein
- For research use only
- Appears as an off-white to light yellow solid
- Molecular weight: 788.02
- Can be stored at -20°C under nitrogen
- Soluble in DMSO at concentrations of ≥ 100 mg/mL
Medchemexpress LLC PLGA-PEG-MAL (60kDA-3.4kDA, LA:GA ratio 75:25) | 95.0% | 60kDA to 3.4kDA | 5 MG
PLGA-PEG-MAL (60kDA-3.4kDA, LA:GA ratio 75:25) is a type of poly(lactide-co-glycolide)-block-poly(ethylene glycol) (PLGA-PEG-Mal) nanoparticle. It has a molecular weight ranging from 60kDA to 3.4kDA and contains a 75:25 ratio of lactic acid (LA) to glycolic acid (GA) molecules. This product is intended for research use only.
- Appearance: Solid
- Color: White to off-white
- Purity: 95.0%
- Solubility in DMSO: 100 mg/mL (requires sonication; use newly opened DMSO)
- Classified as oligonucleotides, polymers, biochemical assay reagents, and drug delivery agents
Medchemexpress LLC Tos-PEG3-CH2COOH | 1581248-63-6 | 98.0% | 362.4 g·mol⁻¹ | C15H22O8S | 5 MG
Tos-PEG3-CH2COOH is a polyethylene glycol (PEG)-based linker bearing a tosylated PEG3 spacer and a terminal carboxylic acid group. It is intended for use in medicinal chemistry workflows as a spacer/conjugation handle during the synthesis of proteolysis-targeting chimeras (PROTACs). Consult the manufacturer's certificate of analysis for batch-specific handling and storage instructions.
- Tosylated PEG3 spacer terminating in a carboxylic acid
- Designed for use as a PROTAC linker and conjugation handle
- Molecular weight 362.4 g·mol⁻¹; formula C15H22O8S
- Available in small research pack sizes suitable for synthesis screening
- Reported purity approximately 98% (supplier listing)
- Store under conditions specified in the certificate of analysis
Medchemexpress LLC Azide-PEG5-tos | 236754-49-7 | MFCD28505520 | 98.5% | 417.48 | C17H27N3O7S | 5 G
Azide-PEG5-Tos is a cleavable 5-unit polyethylene glycol (PEG) linker bearing an azide functional group and a tosyl leaving group, designed for click-chemistry conjugations and the synthesis of antibody-drug conjugates and PROTAC linkers.
- cleavable 5-unit peg linker suitable for ADC and PROTAC synthesis.
- azide functional group for CuAAC and SPAAC click reactions.
- high purity suitable for research applications.
- appearance: liquid, colorless to light yellow.
- molecular formula c17h27n3o7s and molecular weight 417.48 g/mol.
- storage: pure form at -20°C (3 years) or 4°C (2 years); in solvent at -80°C (6 months) or -20°C (1 month).
![eMolecules 2100306-50-9 | N-(Azido-PEG3)-N-Fluorescein-PEG3-acid | Broadpharm | MFCD30723236 | 811.860 | C38H45N5O13S | 98.000 | OC(=O)CCOCCOCCOCCN(CCOCCOCCOCCN=[N+]=[N-])C(=S)Nc1ccc2c(c1)C(=O)OC21c2ccc(O)cc2Oc2cc(O)ccc12 | 5mg | 343283699](https://assets.fishersci.com/TFS-Assets/CCG/product-images/502203407.JPG-250.jpg)
eMolecules 2100306-50-9 | N-(Azido-PEG3)-N-Fluorescein-PEG3-acid | Broadpharm | MFCD30723236 | 811.860 | C38H45N5O13S | 98.000 | OC(=O)CCOCCOCCOCCN(CCOCCOCCOCCN=[N+]=[N-])C(=S)Nc1ccc2c(c1)C(=O)OC21c2ccc(O)cc2Oc2cc(O)ccc12 | 5mg | 343283699
N-(Azido-PEG3)-N-Fluorescein-PEG3-acid | Broadpharm | 2100306-50-9 | MFCD30723236 | 811.860 | C38H45N5O13S | 98.000 | OC(=O)CCOCCOCCOCCN(CCOCCOCCOCCN=[N+]=[N-])C(=S)Nc1ccc2c(c1)C(=O)OC21c2ccc(O)cc2Oc2cc(O)ccc12 | 5mg | 343283699