Biotin and derivatives
Medchemexpress LLC Azido-PEG16-NHS ester | 00-00-0 | 99.9% | C39H72N4O20 | 10MG
Azido-PEG16-NHS ester is a PEG-based bifunctional linker featuring an azide moiety and an N-hydroxysuccinimide (NHS) ester. It enables conjugation to primary amines via the NHS ester and subsequent click chemistry using the azide, making it suitable for bioconjugation, labeling, and PROTAC synthesis. The reagent is provided at high purity and is soluble in DMSO for convenient formulation.
Medchemexpress LLC (S,E)-TCO-NHS ester | 1610931-22-0 | MFCD24386372 | ≥98.0% | 267.28 g/mol | C13H17NO5 | 10 MG
TCO-NHS ester (axial) is a trans-cyclooctene N-hydroxysuccinimide ester used as an amine-reactive building block for bioorthogonal conjugation. It enables rapid inverse electron-demand Diels-Alder (iEDDA) reactions with tetrazine partners and is suitable for labeling or modifying amine-containing small molecules and biomolecules in organic media. The reagent is supplied as a purified solid with supporting analytical documentation for research use.
- Amine-reactive NHS ester for efficient conjugation.
- Fast bioorthogonal iEDDA reactivity with tetrazines.
- Suitable for labeling and bioconjugation of biomolecules.
- High purity for reproducible experimental results.
- Analytical documentation available (SDS, COA, H-NMR).
Medchemexpress LLC Endo-BCN-NHS carbonate | 1426827-79-3 | MFCD19705416 | 99.5% | 291.30 g·mol⁻¹ | C15H17NO5 | 50 MG
endo-BCN-NHS carbonate is an NHS-activated bicyclononyne carbonate reagent used for bioconjugation. It functionalizes primary amines to introduce BCN handles that enable strain-promoted azide-alkyne cycloaddition (SPAAC) for copper-free click chemistry, commonly applied to modify elastin-like proteins and to form cross-linked hydrogels for cell encapsulation studies.
- Reacts with primary amines to install BCN functional groups.
- Enables copper-free strain-promoted azide-alkyne cycloaddition (SPAAC).
- Facilitates hydrogel formation and protein cross-linking for cell encapsulation.
- High purity supports reproducible conjugation chemistry.
- Powder stable at -20°C for long-term storage; solvent stability varies.
Medchemexpress LLC Biotin-oxytocin (biotin-a-hypophamine; biotin-oxytocic hormone) | 99.3% | 1233.48 | C53H80N14O14S3 | 10 MG
Biotin-oxytocin is an N-terminally biotinylated form of the oxytocin peptide supplied for laboratory research use. The peptide retains the native disulfide-stabilized backbone while providing an N-terminal biotin tag for affinity capture, labeling, and detection in biochemical and cell-based assays. Supplied with supporting documentation including a datasheet and COA.
- 99.3% purity.
- Molecular weight 1233.48 Da.
- Sequence: biotin-Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gly-NH2 (disulfide Cys1-Cys6).
- Available sizes: 1 mg, 5 mg, 10 mg, 50 mg, 100 mg.
- Supplied with datasheet, COA, and SDS.
- Intended for research use only.
Medchemexpress LLC Cyanine5.5 NHS ester tetrafluoroborate | 2375105-86-3 | 98.4% | 767.66 | 50 MG
Cyanine5.5 NHS ester tetrafluoroborate is a common fluorescent marker that belongs to the cyanine dye series. It is designed to interact with biomolecules and can bind to double-helical DNA through intercalation, leading to enhanced fluorescence upon binding.
- Functions as a common fluorescent marker for biomolecules
- Interacts with various biomolecules
- Binds to double-helical DNA through intercalation
- Enhances fluorescence upon DNA binding
- Belongs to the cyanine dye series
Medchemexpress LLC Propanoic acid, 3-(2-azidoethoxy)-, 2,5-dioxo-1-pyrrolidinyl ester | 1807530-06-8 | 99.8% | C9H12N4O5 | 100 MG
Azido-PEG1-NHS ester is a PEG-based PROTAC linker utilized in the synthesis of PROTACs. It functions as a click chemistry reagent, containing an Azide group, which allows it to undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) reactions with alkyne-containing molecules. It can also participate in strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules possessing DBCO or BCN groups.
- Functions as a PEG-based PROTAC linker
- Used in PROTAC synthesis
- Acts as a click chemistry reagent
- Contains an azide group for chemical reactions
- Undergoes copper-catalyzed azide-alkyne cycloaddition (CuAAc) with alkyne-containing molecules
- Participates in strain-promoted alkyne-azide cycloaddition (SPAAC) with molecules possessing DBCO or BCN groups
Medchemexpress LLC Nsp-sa-nhs | 199293-83-9 | 99.7% | 681.73 | C32H31N3O10S2 | 10 MG
Acridinium ester reagent for chemiluminescent labeling in immunoassays. It is provided as a high-purity solid for research use and is intended to enable sensitive detection when conjugated to analytes in chemiluminescent assay workflows.
- Used for chemiluminescent immunoassay labeling.
- High purity (≈99.7%) for sensitive detection.
- Molecular weight 681.73 g·mol-1 and formula C32H31N3O10S2.
- CAS number 199293-83-9 for unambiguous identification.
- Supplied in milligram quantities suitable for conjugation workflows.
- Store sealed, protected from moisture and light, preferably at -20°C.
![eMolecules 1204834-00-3 | Azido-PEG8-NHS ester | Broadpharm | MFCD13184949 | 564.589 | C23H40N4O12 | 97.000 | [N-]=[N+]=NCCOCCOCCOCCOCCOCCOCCOCCOCCC(=O)ON1C(=O)CCC1=O | 100mg | 208940019](https://assets.fishersci.com/TFS-Assets/CCG/product-images/5000129977.jpg-250.jpg)
eMolecules 1204834-00-3 | Azido-PEG8-NHS ester | Broadpharm | MFCD13184949 | 564.589 | C23H40N4O12 | 97.000 | [N-]=[N+]=NCCOCCOCCOCCOCCOCCOCCOCCOCCC(=O)ON1C(=O)CCC1=O | 100mg | 208940019
Azido-PEG8-NHS ester | Broadpharm | 1204834-00-3 | MFCD13184949 | 564.589 | C23H40N4O12 | 97.000 | [N-]=[N+]=NCCOCCOCCOCCOCCOCCOCCOCCOCCC(=O)ON1C(=O)CCC1=O | 100mg | 208940019