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 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 EphA2 Human Biotin 20ug
The EphA2 protein is an important member of the ephrin receptor subfamily that mediates developmental events particularly in the nervous system It has a single kinase domain and an extracellular region that binds ephrin-A ligands EphA2 Protein Human (Biotinylated HEK293 His-Avi) is the recombinant human-derived EphA2 protein expressed by HEK293 with C-6 His C-Avi labeled tag
eMolecules m-PEG11-amine | 854601-60-8 | MFCD27977521 | 1g
Broadpharm | m-PEG11-amine | 1g | 229582239 | BP-22080 | 98.000 | 854601-60-8 | MFCD27977521 | 515.641 | C23H49NO11
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Medchemexpress LLC Biotin-PEG3-bromide | 1041766-91-9 | 95.0% | 482.43 g/mol | C18H32BrN3O5S | 50 MG
Biotin-PEG3-bromide is a biotinylated short polyethylene glycol (PEG3) linker terminated with an alkyl bromide. The bromide serves as a reactive leaving group for nucleophilic substitution or cross-coupling reactions, while the biotin enables affinity capture via streptavidin. The PEG3 spacer improves solubility and reduces steric hindrance in bioconjugation and pull-down assays.
- Reactive alkyl bromide for nucleophilic substitution and cross-coupling
- Biotin moiety enables affinity capture with streptavidin
- PEG3 spacer enhances solubility and reduces steric hindrance
- High purity (95.0%) suitable for analytical and preparative use
- Available in small quantities for research use (50 MG)
Medchemexpress LLC Mal-PEG12-NHS ester | 2669737-09-9 | MFCD31811553 | 97.0% | C35H58N2O18 | 10MG
Mal-PEG12-NHS ester is a heterobifunctional PEG12 linker bearing a maleimide and an N-hydroxysuccinimide (NHS) ester. It enables efficient, site-selective conjugation of sulfhydryl-containing molecules to primary amines through a hydrophilic PEG12 spacer, and is commonly used in PROTAC synthesis and general bioconjugation workflows. Molecular weight ≈794.84 g·mol⁻¹; CAS 2669737-09-9; typical purity ≈97%.
- Heterobifunctional maleimide-NHS chemistry for thiol-to-amine conjugation.
- PEG12 spacer increases solubility and reduces steric hindrance.
- Suitable for PROTAC linker synthesis and general bioconjugation.
- High purity (~97%) for reliable analytical and preparative use.
- Available in small-scale quantities for research applications.
eMolecules Z-D-Phe-ONp | 2578-85-0 | MFCD00069875 | 1g
Combi-Blocks | Z-D-Phe-ONp | 1g | 117565853 | SS-9041 | 95.000 | 2578-85-0 | MFCD00069875 | 420.421 | C23H20N2O6
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eMolecules Ambeed m-PEG8-NHS ester 100mg 714088003 A703316 0 000 756525-90-3 MFCD13184969 509 549 C22H39NO12
Ambeed m-PEG8-NHS ester 100mg 714088003 A703316 0 000 756525-90-3 MFCD13184969 509 549 C22H39NO12
eMolecules Broadpharm Azidobutyric acid NHS ester 500mg 779523831 BP-22526 96 000 943858-70-6 MFCD22573606 226 192 C8H10N4O4
Broadpharm Azidobutyric acid NHS ester 500mg 779523831 BP-22526 96 000 943858-70-6 MFCD22573606 226 192 C8H10N4O4
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.