Protein Modification Reagents

Chemscene endo-BCN-PEG3-mal 10mg

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endo-BCN-PEG3-mal 10mg

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Cayman Chemical dPE-PEG 2000-DBCO 5mg

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A metabolite of carbamazepine and oxcarbazepine has been found in wastewater effluent

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Cell Signaling Technology PTMScanR Malonyl-Lysine Mal-K Kit 1 Kit

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PTMScanR Malonyl-Lysine Mal-K Kit 1 Kit

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Medchemexpress LLC DSPE-biotin | 133695-76-8 | MFCD34561787 | 97.5% | 974.36 | C51H96N3O10PS | 10 MG

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DSPE-Biotin is a biotinylated phospholipid used to introduce biotin functionality into liposomes, lipid bilayers, and other lipid-based formulations for biochemical research and bioconjugation. It facilitates specific capture, labeling, and immobilization through high-affinity streptavidin/avidin interactions.

• Provides biotin functionality for liposomes and lipid bilayers.
• Enables high-affinity binding to streptavidin and avidin.
• Suitable for liposome formulation and surface immobilization applications.
• Soluble in DMSO; ultrasonic warming improves solubility.
• High purity for research use; handle and store protected from light.
• Stable when stored at -20°C for long-term storage.

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Revvity Health Sciences Inc chemagic cfDNA 5k Kit (Manual)

chemagic cfDNA 5k Kit (Manual)

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Medchemexpress LLC (S,R,S)-AHPC-PEG4-NH2 | 2010159-57-4 | MFCD31657338 | 95.6% | 663.83 | C32H49N5O8S | 25 MG

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(S,R,S)-AHPC-PEG4-NH2 is an E3 ligase ligand-linker conjugate that combines a VHL-targeting AHPC ligand with a four-unit PEG linker for use in PROTAC design and targeted protein degradation research. It is supplied as a solid powder for laboratory synthesis and biochemical studies.

• Designed for VHL-mediated targeted protein degradation applications.
• Contains a four-unit polyethylene glycol linker to provide flexibility and solubility.
• White to off-white solid powder form suitable for synthesis workflows.
• CAS number 2010159-57-4 for unambiguous identification.
• Molecular weight 663.83 g·mol-1 and formula C32H49N5O8S.
• Recommended storage: powder -20°C (3 years) or 4°C (2 years).

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eMolecules​ 2141976-33-0 | endo-BCN-Peg3-maleimide | Combi-Blocks, Inc.519.595 | C26H37N3O8 | 95.000 | O=C(CCN1C(=O)C=CC1=O)NCCOCCOCCOCCNC(=O)OC[C@@H]1[C@@H]2CCC#CCC[C@H]12 | 100mg | 569346425

endo-BCN-Peg3-maleimide | Combi-Blocks, Inc. | 2141976-33-0519.595 | C26H37N3O8 | 95.000 | O=C(CCN1C(=O)C=CC1=O)NCCOCCOCCOCCNC(=O)OC[C@@H]1[C@@H]2CCC#CCC[C@H]12 | 100mg | 569346425

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eMolecules​ 2107273-26-5 | N-(m-PEG9)-N'-(PEG5-acid)-Cy5 | Broadpharm1093.790 | C57H89ClN2O16 | 97.000 | [Cl-].COCCOCCOCCOCCOCCOCCOCCOCCOCCN1\C(=C\C=C\C=C\C2=[N+](CCOCCOCCOCCOCCOCCC(O)=O)c3ccccc3C2(C)C)C(C)(C)c2ccccc12 | 1mg | 298819341

N-(m-PEG9)-N'-(PEG5-acid)-Cy5 | Broadpharm | 2107273-26-51093.790 | C57H89ClN2O16 | 97.000 | [Cl-].COCCOCCOCCOCCOCCOCCOCCOCCOCCN1\C(=C\C=C\C=C\C2=[N+](CCOCCOCCOCCOCCOCCC(O)=O)c3ccccc3C2(C)C)C(C)(C)c2ccccc12 | 1mg | 298819341

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eMolecules​ 14-(Azide-PEG4-ethylcarbamoyl)tridecanoic-t-butyl ester | Broadpharm |558.761 | C28H54N4O7 | 95.000 | CC(C)(C)OC(=O)CCCCCCCCCCCCC(=O)NCCOCCOCCOCCOCCN=[N+]=[N-] | 100mg | 784455327

14-(Azide-PEG4-ethylcarbamoyl)tridecanoic-t-butyl ester | Broadpharm |558.761 | C28H54N4O7 | 95.000 | CC(C)(C)OC(=O)CCCCCCCCCCCCC(=O)NCCOCCOCCOCCOCCN=[N+]=[N-] | 100mg | 784455327

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eMolecules​ Cy5-PEG4-acid | BroadpharmMFCD28142461 | 766.420 | C43H60ClN3O7 | 96.000 | [Cl-].CN1\C(=C\C=C\C=C\C2=[N+](CCCCCC(=O)NCCOCCOCCOCCOCCC(O)=O)c3ccccc3C2(C)C)C(C)(C)c2ccccc12 | 10mg | 263744692

Cy5-PEG4-acid | BroadpharmMFCD28142461 | 766.420 | C43H60ClN3O7 | 96.000 | [Cl-].CN1\C(=C\C=C\C=C\C2=[N+](CCCCCC(=O)NCCOCCOCCOCCOCCC(O)=O)c3ccccc3C2(C)C)C(C)(C)c2ccccc12 | 10mg | 263744692

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Cayman Chemical Boc-NH-PEG3-CH2CoH 25mg

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A building block; has been used as a linker in the synthesis of PROTACs targeting MEK; has been used as a spacer in the synthesis of radiolabeled probes for dual labeling of tumor integrin αVβ3 and GRPR in tumor tissue in vivo

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eMolecules​ 1352827-47-4 | Fmoc-PEG3-NHS ester | Broadpharm | MFCD28142471 | 540.569 | C28H32N2O9 | 0.000 | O=C(CCOCCOCCOCCNC(=O)OCC1c2ccccc2-c2ccccc12)ON1C(=O)CCC1=O | 1g | 263744723

Fmoc-PEG3-NHS ester | Broadpharm | 1352827-47-4 | MFCD28142471 | 540.569 | C28H32N2O9 | 0.000 | O=C(CCOCCOCCOCCNC(=O)OCC1c2ccccc2-c2ccccc12)ON1C(=O)CCC1=O | 1g | 263744723

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Medchemexpress LLC Mal-PEG2-Val-Cit-PABA | 1662687-83-3 | 98.9% | 590.63 | C27H38N6O9 | 5 MG

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Mal-PEG2-Val-Cit-PABA is a cleavable antibody-drug conjugate (ADC) linker designed for synthesis of ADCs. It features a maleimide reactive handle, a PEG2 spacer for improved hydrophilicity, and a Val-Cit-PABA cleavage motif that enables protease-mediated release of payloads in target cells.

• Cleavable Val-Cit-PABA motif for protease-triggered payload release.
• Maleimide functional group for thiol-selective conjugation to antibodies.
• PEG2 spacer increases hydrophilicity and may reduce aggregation.
• High chemical purity suitable for research and ADC synthesis.
• Stable when stored as powder at -20°C; follow recommended solvent storage conditions.

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Medchemexpress LLC BCN-endo-PEG2-maleimide | 2675364-08-4 | 98.1% | 475.53 | C24H33N3O7 | 25 MG

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A bifunctional linker reagent containing an endo-bicyclononyne reactive group and a maleimide separated by a PEG2 spacer, designed for strain-promoted azide-alkyne cycloaddition and thiol conjugation in bioconjugation and drug-delivery workflows.

• Contains endo-bicyclononyne and maleimide reactive groups.
• Peg2 spacer provides flexibility and solubility.
• Enables catalyst-free strain-promoted azide-alkyne cycloaddition (SPAAC) with azides.
• Compatible with maleimide-mediated thiol conjugation.
• High purity and defined molecular weight for reproducible conjugation.

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Medchemexpress LLC Amino-PEG6-amido-bis-PEG5-N3 | 1147.31 g/mol | C48H94N10O21 | 100 MG

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Amino-PEG6-amido-bis-PEG5-N3 is a cleavable PEG-based linker designed for bioconjugation and click chemistry applications. It contains an azide functional group and an amino terminus, providing an azide handle suitable for copper-catalyzed azide-alkyne cycloaddition and formation of antibody-drug conjugates or other bioconjugates.

• Cleavable 11-unit PEG linker for ADC and bioconjugate synthesis.
• Azide functional group compatible with CuAAC (click chemistry).
• Molecular weight 1,147.31 g/mol; formula C48H94N10O21.
• Appearance oil; colorless to light yellow.
• Solubility in DMSO ≥ 100 mg/mL.
• Storage sealed, away from moisture and light; recommended -20°C (in solvent: -80°C, 6 months; -20°C, 1 month).
• Available in multiple pack sizes including 100 mg.

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