Protein Modification Reagents
Medchemexpress LLC DSPE-PEG-CHO (MW 2000) | 89.0% | 2000 | 25 MG
This product is DSPE-PEG-CHO with an average molecular weight of 2000. It is intended for research use only and has not been fully validated for medical applications.
- White to off-white solid appearance
- Purity of 89.04% by HPLC
- 1H NMR spectrum consistent with its structure
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 | 100 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 100 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: 500 mL HDPE
- Pack Size: 100 g
- Net Weight: 100 g
- Gross Weight: 160.5 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
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
NCCOCCNC(=O)CCCCC(=O)N1Cc2ccccc2C#Cc2ccccc12)(OCC)OCC | 100mg | 649281217](https://assets.fishersci.com/TFS-Assets/CCG/product-images/502480345.JPG-250.jpg)
eMolecules DBCO-PEG-Silane, MW 1,000 | Broadpharm |652.864 | C34H48N4O7Si | 0.000 | CCO[Si](CCNC(=O)NCCOCCNC(=O)CCCCC(=O)N1Cc2ccccc2C#Cc2ccccc12)(OCC)OCC | 100mg | 649281217
DBCO-PEG-Silane, MW 1,000 | Broadpharm |652.864 | C34H48N4O7Si | 0.000 | CCO[Si](CCNC(=O)NCCOCCNC(=O)CCCCC(=O)N1Cc2ccccc2C#Cc2ccccc12)(OCC)OCC | 100mg | 649281217
Medchemexpress LLC Azide-PEG5-tos | 236754-49-7 | 98.5% | 417.48 g·mol⁻¹ | C17H27N3O7S | 1 G
Azide-PEG5-Tos is a cleavable 5-unit polyethylene glycol (PEG) linker bearing an azide functional group and a tosyl terminus, designed for bioconjugation and ADC linker synthesis. The PEG spacer increases aqueous solubility and the azide enables click chemistry reactions such as CuAAC and SPAAC.
- Cleavable 5-unit PEG spacer increases aqueous solubility.
- Azide functional group enables CuAAC and SPAAC click reactions.
- Tosyl terminus acts as a leaving group for nucleophilic substitution.
- Available in multiple pack sizes, including 1 G.
- High purity (98.5%) and characterized molecular weight 417.48 g·mol⁻¹.
Medchemexpress LLC Dbco-peg4-val-cit-pab-mmaf | 2244602-23-9 | 98.7% | 1672.01 g/mol | C88H126N12O20 | 5 MG
DBCO-PEG4-Val-Cit-PAB-MMAF is a cleavable linker-payload conjugate used for antibody-drug conjugate synthesis and bioconjugation. The construct combines a DBCO bioorthogonal handle, a PEG4 spacer, a cathepsin-cleavable valine-citrulline dipeptide with a PAB self-immolative spacer, and an MMAF cytotoxic payload. Analytical documentation and handling instructions are available.
- Enables strain-promoted alkyne-azide cycloaddition (SPAAC) via DBCO for click chemistry.
- Peg4 spacer increases hydrophilicity and reduces aggregation.
- Val-Cit dipeptide is cleavable by cathepsin enzymes for controlled payload release.
- PAB self-immolative spacer allows rapid payload liberation after cleavage.
- Contains MMAF, a tubulin inhibitor payload for ADC applications.
- High reported purity with supporting analytical data and safety documentation.
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 S-acetyl-dPEG4-NHS ester | 937025-17-7 | MFCD11041102 | 98.0% | 421.46 g/mol | C17H27NO9S | 10 MG
S-acetyl-dPEG4-NHS ester is a discrete polyethylene glycol reagent that installs a protected thiol group via an N-hydroxysuccinimide (NHS) ester. It is used to thiolate proteins, peptides, and small molecules to enable downstream conjugation and crosslinking in bioconjugation and drug-delivery research. The reagent is supplied as a solid with reported purity and molecular weight.
- Protected thiol for controlled thiolation reactions.
- NHS-ester reactive group for efficient coupling to amines.
- Discrete PEG4 spacer improves solubility and reduces steric hindrance.
- Facilitates protein, peptide, and small-molecule conjugation.
- Suitable for bioconjugation and drug-delivery research workflows.
- Supplied as a stable solid suitable for storage and handling.
eMolecules 17-(Bromoacetamido-PEG9-ethylcarbamoyl)pentanoic t-butyl ester | Broadpharm |761.745 | C32H61BrN2O13 | 98.000 | CC(C)(C)OC(=O)CCCCC(=O)NCCOCCOCCOCCOCCOCCOCCOCCOCCOCCNC(=O)CBr | 250mg | 490840961
17-(Bromoacetamido-PEG9-ethylcarbamoyl)pentanoic t-butyl ester | Broadpharm |761.745 | C32H61BrN2O13 | 98.000 | CC(C)(C)OC(=O)CCCCC(=O)NCCOCCOCCOCCOCCOCCOCCOCCOCCOCCNC(=O)CBr | 250mg | 490840961
eMolecules 932741-19-0 | Propargyl-PeG3-amine | MFCD20720810 | 1g
Ambeed | Propargyl-PeG3-amine | 1g | 602850701 | A755212 | 932741-19-0 | MFCD20720810 | 187.239 | C9H17NO3
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Sigma Aldrich Fine Chemicals Biosciences Cholesterol-PEG 600 | 69068-97-9 | MFCD00151772 | 500MG
Cholesterol-PEG 600 | 69068-97-9 | MFCD00151772 | 500MG