Protein Modification Reagents
eMolecules TCO-PEG4-NHS ester | 1613439-69-2 | 100MG | Purity: 95%
Broadpharm | TCO-PEG4-NHS ester | 100MG | 1613439-69-2 | MFCD18253569 | MW:487.66
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eMolecules Mal-PEG1-Bromide | 1823885-81-9 | MFCD28015775 | 1g
Broadpharm | Mal-PEG1-Bromide | 1g | 550804065 | BP-22139 | 98.000 | 1823885-81-9 | MFCD28015775 | 248.076 | C8H10BrNO3
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Medchemexpress LLC M-PEG4-hydrazide | 1449390-68-4 | C10H22N2O5 | 10MG
m-PEG4-hydrazide is a methoxy-terminated PEG4 linker containing a terminal hydrazide functional group. It is used as a spacer in PROTAC design and other bioconjugation workflows, enabling hydrazone formation with aldehydes while improving solubility and conformational flexibility. Supplied for research use; follow laboratory safety and handling guidance.
TARGETMOL CHEMICALS INC PEGAMOTECAN 5MG
Also available in 1 mg 10 mg 25 mg 50 mg and bulk. Please contact Fisher for quotes. Pegamotecan (PEG-camptothecin) is a topoisomerase I (TOP1) inhibitor with anticancer activity and it is used in the treatment of esophageal non-small cell lung and pancreatic cancers. purity: 97%
Medchemexpress LLC Mal-PEG2-NHS ester | 1433997-01-3 | MFCD24539465 | 98.6% | 354.31 | C15H18N2O8 | 100 MG
Mal-PEG2-NHS ester is a bifunctional PEG linker designed for bioconjugation, combining a maleimide moiety for thiol coupling with an NHS ester for amine coupling to enable antibody-drug conjugate (ADC) and other conjugation chemistries.
- Non-cleavable dual-reactive linker enabling site-specific conjugation.
- Two-unit PEG spacer increases hydrophilicity and solubility.
- Maleimide group reacts selectively with thiol groups.
- NHS ester reacts with primary amines for stable amide bond formation.
- Available in small-scale quantities suitable for research use.
- Stored and handled to preserve stability: long-term frozen storage recommended.
STA PHARMACEUTICAL US LLC Fmoc-NH-PEG20-CH2CH2COOH | 5 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 5 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: 30 mL HDPE
- Pack Size: 5 g
- Net Weight: 5 g
- Gross Weight: 16.5 g
- Commodity Code: 29242970
- Country Of Origin: China
- IUPAC: 1-(9H-fluoren-9-yl)-3-oxo-2,7,10,13,16,19,22,25,28,31,34,37,40,43,46,49,52,55,58,61,64-henicosaoxa-4-azaheptahexacontan-67-oic acid
- SMILES: O=C(CCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCNC(OCC1C2=C(C=CC=C2)C3=C1C=CC=C3)=O)O
eMolecules Cbz-N-amido-PEG20-acid | 1334177-88-6 | | 1g
Broadpharm | Cbz-N-amido-PEG20-acid | 1g | 550804412 | BP-23802 | 97.000 | 1334177-88-6 | | 1104.288 | C51H93NO24
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eMolecules Aminooxy-PEG2-Amine HCl salt | | | 250mg
Broadpharm | Aminooxy-PEG2-Amine HCl salt | 250mg | 550804659 | BP-24469 | 98.000 | | | 164.205 | C6H16N2O3
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Cayman Chemical -BIotIn-PEG3-amIn 100mg
A synthetic intermediate; has been used in the synthesis of biotinylated siderophores for whole-cell bacterial pull-down assays, as well as in the synthesis of protein-polysaccharide conjugate vaccines for S. pneumoniae
eMolecules Amino-PEG36-CONH-PEG36-acid TFA salt | | | 250mg
Broadpharm | Amino-PEG36-CONH-PEG36-acid TFA salt | 250mg | 550804471 | BP-24009 | 98.000 | | | 3331.989 | C150H300N2O75
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Medchemexpress LLC PC biotin-PEG3-azide | 1937270-46-6 | 97.8% | 825.93 | C35H55N9O12S | 5 MG
PC Biotin-PEG3-azide is a cleavable three-unit polyethylene glycol linker containing a biotin tag and an azide functional group. It is used for antibody-drug conjugate synthesis and bioconjugation via copper-catalyzed or strain-promoted azide-alkyne cycloaddition.
- Cleavable three-unit PEG linker for ADC and conjugation chemistry.
- Azide functional group compatible with CuAAC and SPAAC reactions.
- Biotin tag enables detection and affinity capture.
- High chemical purity suitable for research applications.
- Available in small research quantities (5 mg, 10 mg, larger by quote).
Medchemexpress LLC Dbco-peg4-acetic-val-cit-pab | 98.2% | 855.97 | C45H57N7O10 | 50 MG
DBCO-PEG4-acetic-Val-Cit-PAB is a cleavable four-unit polyethylene glycol (PEG) linker that contains a dibenzocyclooctyne (DBCO) moiety and a Val-Cit-PAB protease-cleavable spacer. It is designed for use in antibody-drug conjugate assembly and for copper-free click chemistry (SPAAC) to attach azide-bearing payloads.
- Cleavable Val-Cit-PAB dipeptide spacer for protease-triggered release.
- Dbco group enables copper-free click conjugation (SPAAC) with azides.
- Four-unit PEG spacer improves solubility and reduces steric hindrance.
- High reported purity and defined molecular weight support reproducible conjugation chemistry.
eMolecules DBCO-PEG9-amine | 2353409-99-9 | | 250mg
Broadpharm | DBCO-PEG9-amine | 250mg | 433947039 | BP-24150 | 98.000 | 2353409-99-9 | | 743.895 | C39H57N3O11
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Lumiprobe AF 488 DBCO, 5 mg Dibenzocyclooctyne (DBCO, DBCO, ADIBO)
Dibenzocyclooctyne (DBCO, DBCO, ADIBO) is one of the most reactive cycloalkynes for copper-free click reaction (SPAAC, strain-promoted azide-alkyne cycloaddition). The rate of interaction of DBCO with azides is significantly higher than that of other cyclooctynes, as well as Cu-catalyzed click reaction (CuAAC). Unlike other cyclooctynes, DBCO does not interact with tetrazines, which makes it possible to use it in bioorthogonal reactions together with trans-cyclooctenes and tetrazines.AF 488 is sulfonated rhodamine, a bright, photostable, and hydrophilic fluorophore that emits in the green channel. The absorption maximum is 495 nm. The emission maximum is 519 nm.AF 488 DBCO allows fluorescent labeling of azide-containing biomolecules inside living cells, whole organisms, and inanimate samples.
![eMolecules Fluorescein-PEG2-azide | Broadpharm | 1146195-72-3 | | 563.590 | C27H25N5O7S | 96.000 | Oc1ccc2c(Oc3cc(O)ccc3C22OC(=O)c3cc(NC(=S)NCCOCCOCCN=[N+]=[N-])ccc23)c1 | 25mg | 138794144](https://assets.fishersci.com/TFS-Assets/CCG/product-images/NC1706638.jpg-250.jpg)
eMolecules Fluorescein-PEG2-azide | Broadpharm | 1146195-72-3 | | 563.590 | C27H25N5O7S | 96.000 | Oc1ccc2c(Oc3cc(O)ccc3C22OC(=O)c3cc(NC(=S)NCCOCCOCCN=[N+]=[N-])ccc23)c1 | 25mg | 138794144
Fluorescein-PEG2-azide | Broadpharm | 1146195-72-3 | | 563.590 | C27H25N5O7S | 96.000 | Oc1ccc2c(Oc3cc(O)ccc3C22OC(=O)c3cc(NC(=S)NCCOCCOCCN=[N+]=[N-])ccc23)c1 | 25mg | 138794144