Protein Modification Reagents
![Carbosynth LLC. Cyclo[Arg-Gly-Asp-D-Tyr-Lys(PEG)], 1mg, MF= C33H52N10O11](https://assets.fishersci.com/TFS-Assets/CCG/product-images/501952421.jpg-250.jpg)
Carbosynth LLC. Cyclo[Arg-Gly-Asp-D-Tyr-Lys(PEG)], 1mg, MF= C33H52N10O11
This item has a minimum order quantity of 3 per supplier requirements
Application: salt: Trifluoroacetate Salt, one letter code: c[RGDyK(PEG)], MW: 764.84
Medchemexpress LLC DBCO-PEG2-DBCO | 2639395-48-3 | MFCD34178807 | 95.4% | 722.83 g/mol | C44H42N4O6 | 10 MG
DBCO-PEG2-DBCO is a bifunctional polyethylene glycol (PEG) linker bearing two terminal dibenzocyclooctyne (DBCO) groups. It is designed for copper-free strain-promoted alkyne-azide cycloaddition (SPAAC) to enable bioconjugation without copper catalysts. The short PEG2 spacer increases solubility and flexibility, and the product is supplied with solubility and storage guidance for research use.
- Supports copper-free click chemistry (SPAAC)
- Contains two terminal DBCO reactive groups
- PEG2 spacer improves aqueous solubility and flexibility
- High reported purity suitable for research applications
- Soluble in DMSO; in vitro and in vivo formulation protocols provided
- Recommended storage as powder at -20°C for long-term stability
eMolecules Amino-PEG36-t-butyl ester | 872340-65-3 | MFCD21363263 | 1g
Broadpharm | Amino-PEG36-t-butyl ester | 1g | 296213789 | BP-21921 | 95.000 | 872340-65-3 | MFCD21363263 | 1731.110 | C79H159NO38
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eMolecules Propargyl-PEG5-OSu | 1393330-40-9 | 1G | Purity: 98%
Broadpharm | Propargyl-PEG5-OSu | 1G | 1393330-40-9 | MFCD13189136 | MW:389.38
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eMolecules Tos-PEG3-CH2CO2tBu | Broadpharm | 882518-89-0 | MFCD27977515 | 374.450 | C17H26O7S | 0.000 | Cc1ccc(cc1)S(=O)(=O)OCCOCCOCC(=O)OC(C)(C)C | 250mg | 229582215
Tos-PEG3-CH2CO2tBu | Broadpharm | 882518-89-0 | MFCD27977515 | 374.450 | C17H26O7S | 0.000 | Cc1ccc(cc1)S(=O)(=O)OCCOCCOCC(=O)OC(C)(C)C | 250mg | 229582215
eMolecules 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
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
eMolecules Bromoacetamido-PEG2-Boc-amine | 182244-33-3 | MFCD28142467 | 1g
Broadpharm | Bromoacetamido-PEG2-Boc-amine | 1g | 296213749 | BP-22338 | 98.000 | 182244-33-3 | MFCD28142467 | 369.256 | C13H25BrN2O5
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![Carbosynth LLC. Cyclo[Arg-Ala-Asp-D-Tyr-Lys(PEG)], 1mg, MF= C34H54N10O11](https://assets.fishersci.com/TFS-Assets/CCG/product-images/501952424.jpg-250.jpg)
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
Medchemexpress LLC N-(2-(4-(3,5-dioxo-1,2,4-triazolidin-4-yl)-2-methoxyphenoxy)ethyl)-4,7,10,13-tetraoxahexadec-15-ynami | 99.3% | 508.52 g/mol | C23H32N4O9 | 25 MG
PTAD-PEG4-alkyne is a heterobifunctional linker containing a PTAD tyrosine-reactive moiety and a terminal alkyne separated by a four-unit PEG spacer. It is used for bioconjugation and antibody-drug conjugate synthesis to enable tyrosine-selective labeling and alkyne-based click chemistry.
- Cleavable PEG4 spacer for improved solubility and flexibility.
- Terminal alkyne for copper-catalyzed azide-alkyne cycloaddition.
- PTAD moiety enables tyrosine-selective conjugation.
- High purity (99.26%) suitable for research use.
- Soluble in DMSO (125 mg/mL); powder stable at -20°C.
Medchemexpress LLC 5,8,11-trioxa-2-azatetradecanedioic acid, 1-(4-cycloocten-1-yl) ester | 2141981-86-2 | ≥98.0% | 373.44 g/mol | C18H31NO7 | 5 MG
TCO-PEG3-acid is a trans-cyclooctene-functionalized PEG3 carboxylic acid used as a click-chemistry reagent for rapid bioorthogonal conjugation. The TCO moiety undergoes inverse-electron-demand Diels-Alder (iEDDA) reactions with tetrazine derivatives, enabling fast and selective labeling or linker assembly in chemical biology and bioconjugation workflows.
- Provides rapid, bioorthogonal iEDDA conjugation with tetrazine partners.
- Includes a PEG3 spacer to improve solubility and reduce steric hindrance.
- Terminal carboxylic acid enables standard coupling chemistries.
- High solubility in DMSO; ultrasonic assistance may aid dissolution.
- Stable under recommended storage conditions (for example, -20°C for extended storage).
- Suitable for labeling, linker synthesis, and bioconjugation applications.
Medchemexpress LLC Ald-ph-amido-peg4-c2-acid | 1309460-27-2 | 99.1% | 397.42 | C19H27NO8 | 250 MG
Ald-Ph-amido-PEG4-C2-acid is a noncleavable polyethylene glycol (PEG4) linker intended for use in antibody-drug conjugate (ADC) research. It provides a stable, non-cleavable connection between an antibody and a payload, and is supplied at high purity to support reproducible bioconjugation.
- Noncleavable PEG4 linker suitable for ADC development.
- Terminal carboxylic acid enables amide coupling to payloads.
- Benzaldehyde moiety enables selective conjugation to hydrazide or aminooxy groups.
- High purity supports reproducible conjugation results.
- Molecular weight 397.42 g/mol and formula C19H27NO8.
eMolecules Cbz-N-amido-PEG3-acid | Broadpharm | 1310327-18-4 | MFCD28142484 | 355.387 | C17H25NO7 | 98.000 | OC(=O)CCOCCOCCOCCNC(=O)OCc1ccccc1 | 1g | 263744768
Cbz-N-amido-PEG3-acid | Broadpharm | 1310327-18-4 | MFCD28142484 | 355.387 | C17H25NO7 | 98.000 | OC(=O)CCOCCOCCOCCNC(=O)OCc1ccccc1 | 1g | 263744768
Medchemexpress LLC NHPI-PEG4-C2-Pfp ester | 2101206-46-4 | MFCD28899317 | ≥97.0% | 577.45 g/mol | C25H24F5NO9 | 250 MG
NHPI-PEG4-C2-Pfp ester is a pentafluorophenyl-activated ester containing an N-hydroxyphthalimide-PEG4-C2 spacer. It is supplied as a high-purity research reagent used as a reactive linker intermediate for antibody-drug conjugate (ADC) synthesis and bioconjugation applications.
- Purity ≥97.0% (NMR)
- CAS number 2101206-46-4
- Molecular weight 577.45 g/mol
- Chemical formula C25H24F5NO9
- Used as a reactive linker for antibody-drug conjugates and bioconjugation
- Recommended storage: -20°C for up to 3 years; in solvent -80°C for up to 6 months