Protein Modification Reagents

Medchemexpress LLC Dbco-NHCO-PEG4-NH-Boc | 1255942-12-1 | MFCD30730371 | 98.0% | 623.74 g/mol | C34H45N3O8 | 50 MG

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DBCO-NHCO-PEG4-NH-Boc is a DBCO-containing PEG4-based linker and click chemistry reagent used for strain-promoted alkyne-azide cycloaddition (SPAAC). It is commonly applied in antibody-drug conjugate assembly, PROTAC construction, and site-specific bioconjugation. The molecule contains a Boc-protected amine and a PEG4 spacer to improve solubility and flexibility.

• enables copper-free SPAAC bioconjugation
• contains a PEG4 spacer for improved solubility
• features a Boc-protected amine for orthogonal deprotection
• suitable for ADC and PROTAC linker synthesis
• provided as a small-scale reagent for research use

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Medchemexpress LLC M-PEG-DMG | 1019000-64-6 | 98.0% | 2000 Da (average) | 25 MG

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m-PEG-DMG (MW 2000) is a methoxy-polyethylene glycol-dimyristoyl glycerol PEG-lipid used to formulate PEGylated liposomes and lipid nanoparticles for research. It combines a hydrophobic dimyristoyl glycerol anchor with an average 2000 Da PEG chain to stabilize lipid bilayers, improve colloidal stability, and extend particle circulation in aqueous formulations.

• Provides a hydrophilic PEG spacer to sterically stabilize liposomes and nanoparticles.
• Average molecular weight 2000 Da for predictable PEG coverage.
• Dimyristoyl glycerol anchor promotes incorporation into lipid bilayers.
• Improves colloidal stability and reduces particle aggregation.
• Suitable for research use in drug delivery and formulation studies.

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eMolecules​ 872340-65-3 | Amino-PEG36-t-butyl ester | Broadpharm | MFCD21363263 | 1731.110 | C79H159NO38 | 97.000 | CC(C)(C)OC(=O)CCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCN | 1g | 296213789

Amino-PEG36-t-butyl ester | Broadpharm | 872340-65-3 | MFCD21363263 | 1731.110 | C79H159NO38 | 97.000 | CC(C)(C)OC(=O)CCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCN | 1g | 296213789

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eMolecules​ 1393330-40-9 | Propargyl-PEG5-NHS ester | Broadpharm | MFCD22574798 | 401.412 | C18H27NO9 | 98.000 | O=C(CCOCCOCCOCCOCCOCC#C)ON1C(=O)CCC1=O | 1g | 137364399

Propargyl-PEG5-NHS ester | Broadpharm | 1393330-40-9 | MFCD22574798 | 401.412 | C18H27NO9 | 98.000 | O=C(CCOCCOCCOCCOCCOCC#C)ON1C(=O)CCC1=O | 1g | 137364399

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eMolecules​ 1599472-25-9 | Mal-PEG6-NHS ester | Broadpharm | MFCD20926374 | 530.527 | C23H34N2O12 | 98.000 | O=C(CCOCCOCCOCCOCCOCCOCCN1C(=O)C=CC1=O)ON1C(=O)CCC1=O | 250mg | 208572696

Mal-PEG6-NHS ester | Broadpharm | 1599472-25-9 | MFCD20926374 | 530.527 | C23H34N2O12 | 98.000 | O=C(CCOCCOCCOCCOCCOCCOCCN1C(=O)C=CC1=O)ON1C(=O)CCC1=O | 250mg | 208572696

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eMolecules​ 182244-33-3 | Bromoacetamido-PEG2-Boc-amine | Broadpharm | MFCD28142467 | 369.256 | C13H25BrN2O5 | 98.000 | CC(C)(C)OC(=O)NCCOCCOCCNC(=O)CBr | 1g | 296213749

Bromoacetamido-PEG2-Boc-amine | Broadpharm | 182244-33-3 | MFCD28142467 | 369.256 | C13H25BrN2O5 | 98.000 | CC(C)(C)OC(=O)NCCOCCOCCNC(=O)CBr | 1g | 296213749

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eMolecules​ 1343476-41-4 | Acid-PEG5-NHS ester | Broadpharm | MFCD27952888 | 435.426 | C18H29NO11 | 98.000 | OC(=O)CCOCCOCCOCCOCCOCCC(=O)ON1C(=O)CCC1=O | 1g | 550804100

Acid-PEG5-NHS ester | Broadpharm | 1343476-41-4 | MFCD27952888 | 435.426 | C18H29NO11 | 98.000 | OC(=O)CCOCCOCCOCCOCCOCCC(=O)ON1C(=O)CCC1=O | 1g | 550804100

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eMolecules​ 2112731-94-7 | N-(Azido-PEG3)-N-Boc-PEG4-t-butyl ester | Broadpharm | MFCD30723227 | 622.757 | C28H54N4O11 | 98.000 | CC(C)(C)OC(=O)CCOCCOCCOCCOCCN(CCOCCOCCOCCN=[N+]=[N-])C(=O)OC(C)(C)C | 500mg | 343283678

N-(Azido-PEG3)-N-Boc-PEG4-t-butyl ester | Broadpharm | 2112731-94-7 | MFCD30723227 | 622.757 | C28H54N4O11 | 98.000 | CC(C)(C)OC(=O)CCOCCOCCOCCOCCN(CCOCCOCCOCCN=[N+]=[N-])C(=O)OC(C)(C)C | 500mg | 343283678

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Medchemexpress LLC Cholesterol-PEG-MAL | 95.1% | 2000 (average) | 100 MG

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Cholesterol-PEG-MAL (MW 2000) is a cholesterol-terminated polyethylene glycol bearing a terminal maleimide group. It serves as a pegylated lipid for liposome and nanoparticle preparation, enabling membrane anchoring and covalent conjugation to thiol-containing molecules. Supplied as a light yellow solid, it is soluble in DMSO and intended for research use.

• enables thiol-specific covalent conjugation via maleimide chemistry.
• provides a hydrophobic anchor for stable membrane insertion.
• average molecular weight 2000 for predictable spacer length.
• high purity suitable for research applications.
• soluble in DMSO at high concentration with sonication.
• stable when stored frozen as a powder.

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Carbosynth LLC. Cyclo[Arg-Ala-Asp-D-Tyr-Lys(PEG)], 1mg, MF= C34H54N10O11

This item has a minimum order quantity of 3 per supplier requirements
Application: Control peptide for RGD-3000-PI, salt: Trifluoroacetate Salt, one letter code: c[RADyK(PEG)], MW: 778.87

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Medchemexpress LLC HY-128767 5mg Medchemexpress, VH032-PEG3-acetylene CAS:2098799-80-3 Purity:>98%

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Medchemexpress, HY-128767 5mg VH032-PEG3-acetylene CAS:2098799-80-3 VH032-PEG3-acetylene is a synthesized E3 ligase ligand-linker conjugate that incorporates the VH032 based VHL ligand and a 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.

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Hampton Research HR2-139/PEG/Ion HT - 1 ml, Deep Well block format

HR2-139/PEG/Ion HT - 1 ml, Deep Well block format. Please note items from this supplier are non-returnable.

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STA Pharmaceutical Fmoc-NH-PEG20-CH2CH2COOH | 25 g | CAS 1952360-93-8 | MDL MFCD21363316

Fmoc-NH-PEG20-CH2CH2COOH is a Amino Acid reagent (Subcategory: PEG AA) sold by WuXi TIDES. Offered in 25 g. Store at 4 °C. SDS available for reference.

Specifications
- CAS: 1952360-93-8
- MDL: MFCD21363316
- InChIKey: YIKBHNBKAGGRHQ-UHFFFAOYSA-N
- Molecular Weight: 1192.397
- Molecular Formula: C58H97NO24
- Purity: ≥95%
- Container Type: 125 mL HDPE
- Pack Size: 25 g
- Net Weight: 25 g
- Gross Weight: 54.3 g
- Commodity Code: 29242970
- Country Of Origin: China
- IUPAC: 1-(9H-fluoren-9-yl)-3-oxo-2,7,10,13,16,19,22,25,28,31,34,37,40,43,46,49,52,55,58,61,64-henicosaoxa-4-azaheptahexacontan-67-oic acid
- SMILES: O=C(CCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCNC(OCC1C2=C(C=CC=C2)C3=C1C=CC=C3)=O)O

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Medchemexpress LLC NH2-C5-PEG4-N3-L-lysine-PEG3-N3 | 99.4% | 619.71 g/mol | C25H49N9O9 | 100 MG

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A cleavable 7-unit polyethylene glycol (PEG) linker with an amino terminus and azide functionality used for antibody-drug conjugate (ADC) synthesis and bioconjugation workflows.

• Cleavable 7-unit PEG linker suitable for ADC synthesis.
• Contains amino (NH2) and azide (N3) functional groups for conjugation.
• High purity: 99.4%.
• Molecular weight: 619.71 g/mol.
• Soluble ≥ 100 mg/mL in water for aqueous conjugations.
• Available in multiple pack sizes, including 100 MG.

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eMolecules​ 951671-87-7 | DNP-PEG3-azide | Broadpharm | MFCD30182049 | 384.349 | C14H20N6O7 | 98.000 | [O-][N+](=O)c1ccc(NCCOCCOCCOCCN=[N+]=[N-])c(c1)[N+]([O-])=O | 500mg | 309208997

DNP-PEG3-azide | Broadpharm | 951671-87-7 | MFCD30182049 | 384.349 | C14H20N6O7 | 98.000 | [O-][N+](=O)c1ccc(NCCOCCOCCOCCN=[N+]=[N-])c(c1)[N+]([O-])=O | 500mg | 309208997

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