Protein Modification Reagents
eMolecules 1393330-40-9 | Propargyl-PEG5-NHS ester | Broadpharm | MFCD22574798 | 401.412 | C18H27NO9 | 98.000 | O=C(CCOCCOCCOCCOCCOCC#C)ON1C(=O)CCC1=O | 100mg | 229582898
Propargyl-PEG5-NHS ester | Broadpharm | 1393330-40-9 | MFCD22574798 | 401.412 | C18H27NO9 | 98.000 | O=C(CCOCCOCCOCCOCCOCC#C)ON1C(=O)CCC1=O | 100mg | 229582898
eMolecules 1924596-31-5 | Mal-amido-PEG8-TFP ester | Broadpharm | MFCD28505514 | 740.699 | C32H44F4N2O13 | 98.000 | Fc1cc(F)c(F)c(OC(=O)CCOCCOCCOCCOCCOCCOCCOCCOCCNC(=O)CCN2C(=O)C=CC2=O)c1F | 500mg | 279709072
Mal-amido-PEG8-TFP ester | Broadpharm | 1924596-31-5 | MFCD28505514 | 740.699 | C32H44F4N2O13 | 98.000 | Fc1cc(F)c(F)c(OC(=O)CCOCCOCCOCCOCCOCCOCCOCCOCCNC(=O)CCN2C(=O)C=CC2=O)c1F | 500mg | 279709072
STA Pharmaceutical Azide-PEG3-L-alanine-Fmoc | 10 g | CAS 2054345-69-4 | InChIKey YTHKPQSMRZQREU-JOCHJYFZSA-N
Azide-PEG3-L-alanine-Fmoc is a Amino Acid reagent (Subcategory: Azido/Alkynyl AA) sold by WuXi TIDES. Offered in 10 g. Store at 4 °C. SDS available for reference.
Specifications
- CAS: 2054345-69-4
- MDL: No data
- InChIKey: YTHKPQSMRZQREU-JOCHJYFZSA-N
- Molecular Weight: 484.509
- Molecular Formula: C24H28N4O7
- Purity: ≥95%
- Container Type: 60 mL HDPE
- Pack Size: 10 g
- Net Weight: 10 g
- Gross Weight: 25 g
- Commodity Code: 29299090
- Country Of Origin: China
- IUPAC: N-(((9H-fluoren-9-yl)methoxy)carbonyl)-O-(2-(2-(2-azidoethoxy)ethoxy)ethyl)-D-serine
- SMILES: O=C(N[C@H](COCCOCCOCCN=[N+]=[N-])C(O)=O)OCC1C2=C(C=CC=C2)C3=C1C=CC=C3
Medchemexpress LLC Bromoacetamido-PEG2-C2-NHS ester | 1353011-78-5 | 95.0% | C13H19BrN2O7 | 25 MG
Bromoacetamido-PEG2-C2-NHS ester is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs. PROTACs exploit the intracellular ubiquitin-proteasome system to selectively degrade target proteins.
- PEG-based PROTAC linker
- Utilized in the synthesis of PROTACs
- PROTACs contain two different ligands connected by a linker
- Selectively degrades target proteins
eMolecules Bromo-PEG24-t-butyl ester | Broadpharm |1266.355 | C55H109BrO26 | 98.000 | CC(C)(C)OC(=O)CCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCBr | 250mg | 452533439
Bromo-PEG24-t-butyl ester | Broadpharm |1266.355 | C55H109BrO26 | 98.000 | CC(C)(C)OC(=O)CCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCBr | 250mg | 452533439
Medchemexpress LLC DBCO-(PEG)3-VC-PAB-MMAE | 2754384-60-4 | 99.60% | 1613.97 | 100 UG
DBCO-(PEG)3-VC-PAB-MMAE is an agent-linker conjugate for ADC, formed by conjugating Monomethyl auristatin E (HY-15162) to a DBCO-(PEG)3-vc-PAB linker. It can be used for cancer research and functions as a click chemistry reagent, containing a DBCO group that undergoes strain-promoted alkyne-azide cycloaddition (SPAAC) with azide groups.
- Agent-linker conjugate for ADC
- Click chemistry reagent
- Contains a DBCO group for SPAAC with azide groups
- For research use only
Medchemexpress LLC M-PEG-DSPE sodium | 95.0% | 3000 (average) | 25 MG
m-PEG-DSPE sodium (MW 3000) is a methoxy polyethylene glycol-distearoylphosphatidylethanolamine (PEG-lipid) provided as the sodium salt for use in drug delivery research. It is formulated to act as a surface-modifying lipid that improves colloidal stability and tissue targeting when incorporated into liposomes or nanoparticles.
- Provides hydrophilic PEG coating to reduce protein adsorption and extend circulation time.
- Average molecular weight of 3000 for predictable PEG chain length.
- Solid, white to off-white material suitable for formulation.
- High purity (95.0%) for reproducible experimental results.
- Compatible with nanoparticle and liposome formulation workflows.
- Store sealed at -20°C; solvent storage guidance for longer-term stability.
Medchemexpress LLC Mal-amido-PEG1-C2-NHS ester | 1260092-50-9 | 99.7% | 381.34 | C16H19N3O8 | 50 MG
Mal-amido-PEG1-C2-NHS ester is a non-cleavable antibody-drug conjugate (ADC) linker that contains a maleimide group and an N-hydroxysuccinimide (NHS) ester, used for bioconjugation to label primary amines on proteins, oligonucleotides, and other amine-containing molecules. The product is supplied as a high-purity, white to off-white solid and requires cold, inert storage to maintain stability.
- Contains maleimide and NHS ester functional groups.
- Enables selective labeling of primary amines.
- High purity (≈99.7%).
- Molecular weight 381.34 and formula C16H19N3O8.
- Available in multiple sizes including 50 mg.
- Store at -20°C, protect from light, under nitrogen; in solution: -80°C up to 6 months.
Medchemexpress LLC Biotin-PEG4-acid | 721431-18-1 | 97.0% | 250 MG
Biotin-PEG4-acid is a PEG-based PROTAC linker utilized in the synthesis of PROTACs. This product is intended for research use only.
- PEG-based PROTAC linker
- Can be used in PROTAC synthesis
- White to off-white solid appearance
- Molecular weight: 491.60
- Molecular formula: C21H37N3O8S
- Store powder at -20°C for 3 years, 4°C for 2 years
- Store in solvent at -80°C for 6 months, -20°C for 1 month
Medchemexpress LLC 4-Arm PEG-Azide MW 25mg
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 3-[2-[2-(2-aminoethoxy)ethoxy]ethoxy]propanoic acid | 663921-15-1 | MFCD21607085 | 99.9% | 265.30 g/mol | C11H23NO6 | 1 G](https://assets.fishersci.com/TFS-Assets/CCG/product-images/5000202923.png-250.jpg)
Medchemexpress LLC 3-[2-[2-(2-aminoethoxy)ethoxy]ethoxy]propanoic acid | 663921-15-1 | MFCD21607085 | 99.9% | 265.30 g/mol | C11H23NO6 | 1 G
NH2-PEG4-CH2CH2COOH is an amine-terminated, four-unit polyethylene glycol (PEG) linker with a terminal propanoic acid. It is intended for use in bioconjugation workflows such as antibody-drug conjugate (ADC) and PROTAC linker synthesis and is supplied as an off-white to light yellow solid with high reported purity.
- cleavable four-unit peg linker suitable for ADC and PROTAC synthesis.
- amine-terminated functionality for facile conjugation to drugs or linkers.
- high purity (≈99.9%) for research applications.
- molecular weight around 265.30 g/mol and formula C11H23NO6.
- available in small research pack sizes (e.g., 100 mg-10 g).
- store sealed, away from moisture and light; for solutions store at -80°C (long term) or -20°C (short term).
Medchemexpress LLC E3 LIGASE LIGANDLINKER2(100MG)
Pomalidomide-PEG4-Ph-NH2 (Synonyms: Cereblon Ligand-Linker Conjugates 9; E3 Ligase Ligand-Linker Conjugates 2). Purity: >98.0%.CAS 1818885-63-0
Medchemexpress LLC NHS-PEG2-SS-PEG2-NHS | 96.7% | 580.63 g/mol | C22H32N2O12S2 | 5 MG
NHS-PEG2-SS-PEG2-NHS is a cleavable four-unit polyethylene glycol (PEG) linker with N-hydroxysuccinimide (NHS) ester end groups and a disulfide (SS) cleavable junction, supplied for use in antibody-drug conjugate synthesis and other bioconjugation applications.
- Cleavable disulfide bond enables reductive release of payloads.
- Hydrophilic PEG spacer improves solubility and reduces aggregation.
- NHS ester end groups provide rapid amine coupling to proteins.
- Moderate molecular weight supports spacer function without excessive steric bulk.
- Available in small research sizes suitable for conjugation optimization.
Medchemexpress LLC HY-128716A 100mg Medchemexpress, Pomalidomide-PEG3-C2-NH2 (TFA) CAS: Purity:>98%
Medchemexpress, HY-128716A 100mg Pomalidomide-PEG3-C2-NH2 (TFA) CAS: Pomalidomide-PEG3-C2-NH2 TFA is a synthesized E3 ligase ligand-linker conjugate that incorporates the Pomalidomide based cereblon ligand and 3-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.
eMolecules 20-(Amine-PEG3-ethylcarbamoyl)nonadecanoic-t-butyl ester | Broadpharm |572.872 | C32H64N2O6 | 0.000 | CC(C)(C)OC(=O)CCCCCCCCCCCCCCCCCCC(=O)NCCOCCOCCOCCN | 100mg | 784455341
20-(Amine-PEG3-ethylcarbamoyl)nonadecanoic-t-butyl ester | Broadpharm |572.872 | C32H64N2O6 | 0.000 | CC(C)(C)OC(=O)CCCCCCCCCCCCCCCCCCC(=O)NCCOCCOCCOCCN | 100mg | 784455341