Protein Modification Reagents
Medchemexpress LLC Dbco-peg4-acetic-val-cit-pab | 98.2% | 855.97 | C45H57N7O10 | 100 MG
Cleavable 4-unit PEG antibody-drug conjugate (ADC) linker that contains a DBCO functional group for strain-promoted alkyne-azide cycloaddition (SPAAC). It is used to conjugate payloads to azide-containing molecules in ADC and bioconjugation workflows.
- Cleavable Val-Cit-PAB linker for cathepsin B-mediated payload release.
- DBCO moiety enables copper-free SPAAC with azide-functionalized partners.
- PEG4 spacer improves solubility and reduces steric hindrance.
- Available in multiple pack sizes, including 100 MG for synthesis scale-up.
- High reported purity suitable for synthetic bioconjugation applications.
![eMolecules 16-(Azide-PEG5-ethylcarbamoyl)pentadecanoic-t-butyl ester | Broadpharm |630.868 | C32H62N4O8 | 95.000 | CC(C)(C)OC(=O)CCCCCCCCCCCCCCC(=O)NCCOCCOCCOCCOCCOCCN=[N+]=[N-] | 100mg | 784455334](https://assets.fishersci.com/TFS-Assets/CCG/product-images/502473289.JPG-250.jpg)
eMolecules 16-(Azide-PEG5-ethylcarbamoyl)pentadecanoic-t-butyl ester | Broadpharm |630.868 | C32H62N4O8 | 95.000 | CC(C)(C)OC(=O)CCCCCCCCCCCCCCC(=O)NCCOCCOCCOCCOCCOCCN=[N+]=[N-] | 100mg | 784455334
16-(Azide-PEG5-ethylcarbamoyl)pentadecanoic-t-butyl ester | Broadpharm |630.868 | C32H62N4O8 | 95.000 | CC(C)(C)OC(=O)CCCCCCCCCCCCCCC(=O)NCCOCCOCCOCCOCCOCCN=[N+]=[N-] | 100mg | 784455334
eMolecules Broadpharm DBCO-PEG4-NHS ester 100mg 254745435 BP-22288 98 000 1427004-19-0 MFCD26793797 649 697 C34H39N3O10
Broadpharm DBCO-PEG4-NHS ester 100mg 254745435 BP-22288 98 000 1427004-19-0 MFCD26793797 649 697 C34H39N3O10
eMolecules 1334177-86-4 | Mal-amido-PEG8-acid | Combi-Blocks, Inc. | MFCD13184956 | 592.639 | C26H44N2O13 | 97.000 | OC(=O)CCOCCOCCOCCOCCOCCOCCOCCOCCNC(=O)CCN1C(=O)C=CC1=O | 10g | 837468037
Mal-amido-PEG8-acid | Combi-Blocks, Inc. | 1334177-86-4 | MFCD13184956 | 592.639 | C26H44N2O13 | 97.000 | OC(=O)CCOCCOCCOCCOCCOCCOCCOCCOCCNC(=O)CCN1C(=O)C=CC1=O | 10g | 837468037
eMolecules 1314378-14-7 | Fmoc-PEG4-NHS ester | Broadpharm | MFCD20227659 | 584.622 | C30H36N2O10 | 97.000 | O=C(CCOCCOCCOCCOCCNC(=O)OCC1c2ccccc2-c2ccccc12)ON1C(=O)CCC1=O | 1g | 229582925
Fmoc-PEG4-NHS ester | Broadpharm | 1314378-14-7 | MFCD20227659 | 584.622 | C30H36N2O10 | 97.000 | O=C(CCOCCOCCOCCOCCNC(=O)OCC1c2ccccc2-c2ccccc12)ON1C(=O)CCC1=O | 1g | 229582925
eMolecules t-BuO2C-PEG4-SS-PEG4-CO2tBu | BroadpharmMFCD28950761 | 674.900 | C30H58O12S2 | 94.000 | CC(C)(C)OC(=O)CCOCCOCCOCCOCCSSCCOCCOCCOCCOCCC(=O)OC(C)(C)C | 250mg | 282987761
t-BuO2C-PEG4-SS-PEG4-CO2tBu | BroadpharmMFCD28950761 | 674.900 | C30H58O12S2 | 94.000 | CC(C)(C)OC(=O)CCOCCOCCOCCOCCSSCCOCCOCCOCCOCCC(=O)OC(C)(C)C | 250mg | 282987761
eMolecules 1198080-04-4 | Propargyl-PEG6-amine | Combi-Blocks, Inc. | MFCD29042376 | 319.398 | C15H29NO6 | 95.000 | NCCOCCOCCOCCOCCOCCOCC#C | 5g | 603148135
Propargyl-PEG6-amine | Combi-Blocks, Inc. | 1198080-04-4 | MFCD29042376 | 319.398 | C15H29NO6 | 95.000 | NCCOCCOCCOCCOCCOCCOCC#C | 5g | 603148135
Medchemexpress LLC Dspe-peg 2000 | 892144-24-0 | 99.37% | (C2H4O)nC42H82NO10P | 500 MG
DSPE-PEG 2000 is a PEG polymer that incorporates DSPE and amine end groups. This compound can be effectively utilized for forming micelles, which are critical nanoparticles for advanced drug delivery systems.
- Forms micelles as nanoparticles
- Suitable for drug delivery applications
- Contains DSPE and amine end groups
Medchemexpress LLC Dspe-m-peg-nhs | 99.4% | 3,400 Da (average) | 25 MG
DSPE-m-PEG-NHS (MW 3400) is a PEGylated phospholipid with an N-hydroxysuccinimide (NHS) activated ester on the PEG terminus. Supplied as a powder with an average molecular weight of approximately 3,400 Da, it is used to introduce PEG-lipid functionality into liposomes and lipid nanoparticles and to enable covalent attachment of amine-containing ligands for targeted delivery and surface modification.
- NHS-activated ester for efficient amide bond formation with primary amines.
- Average molecular weight approximately 3,400 Da for predictable PEG length.
- Powder form suitable for storage under frozen conditions.
- Compatible with liposome and lipid nanoparticle formulation workflows.
- Enables surface conjugation of proteins, peptides, or antibodies.
- High purity to support reproducible formulation and conjugation performance.
Medchemexpress LLC 1,2-distearoyl-sn-glycero-3-phosphoethanolamine N-(polyethylene glycol)-fluorescein | 1000788-53-3 | 90.3% | 3,400 Da | N/A | 100 MG
DSPE-PEG-FITC (MW 3400) is a fluorescein-labeled PEGylated phospholipid consisting of a DSPE lipid conjugated to polyethylene glycol terminated with fluorescein isothiocyanate (FITC). It is supplied as a solid and is used to prepare fluorescently labeled liposomes, micelles, and lipid nanoparticles for tracking, imaging, and surface functionalization in research and development applications.
- Provides a fluorescent FITC probe for lipid-based nanoparticle labeling.
- Enables liposome and micelle labeling for imaging and tracking studies.
- PEG spacer imparts steric stability and reduces aggregation.
- Average molecular weight approximately 3,400 Da for consistent performance.
- Supplied as a solid with reported purity for research use.
eMolecules 784105-33-5 | 3-(2-(2-(2-Aminoethoxy)ethoxy)ethoxy)propanoic acid | MFCD21607085 | 1g
Ambeed | 3-(2-(2-(2-Aminoethoxy)ethoxy)ethoxy)propanoic acid | 1g | 527375175 | A116310 | 784105-33-5 | MFCD21607085 | 221.253 | C9H19NO5
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Medchemexpress LLC Biotin-PEG2-acid | 1365655-89-5 | >97.0% | 403.49 g/mol | C17H29N3O6S | 50 MG
Biotin-PEG2-acid is a non-cleavable, two-unit polyethylene glycol (PEG) linker bearing a biotin affinity tag and a terminal carboxylic acid. It is supplied as an off-white to gray solid and is used to introduce hydrophilicity and a biotin handle in conjugation chemistries such as ADC and PROTAC synthesis.
- Non-cleavable two-unit PEG spacer improves solubility and linker flexibility.
- Terminal carboxylic acid enables standard conjugation chemistries.
- Biotin tag allows affinity capture and detection.
- High purity suitable for research applications.
- Available in multiple pack sizes including 50 MG for small-scale use.
![eMolecules Biotin-PEG-Thiol, MW 2,000 | Broadpharm |347.490 | C14H25N3O3S2 | 0.000 | SCCOCCNC(=O)CCCC[C@@H]1SC[C@@H]2NC(=O)N[C@H]12 | 500mg | 627958177](https://assets.fishersci.com/TFS-Assets/CCG/product-images/502475698.JPG-250.jpg)
eMolecules Biotin-PEG-Thiol, MW 2,000 | Broadpharm |347.490 | C14H25N3O3S2 | 0.000 | SCCOCCNC(=O)CCCC[C@@H]1SC[C@@H]2NC(=O)N[C@H]12 | 500mg | 627958177
Biotin-PEG-Thiol, MW 2,000 | Broadpharm |347.490 | C14H25N3O3S2 | 0.000 | SCCOCCNC(=O)CCCC[C@@H]1SC[C@@H]2NC(=O)N[C@H]12 | 500mg | 627958177