Biotin and derivatives
Medchemexpress LLC Azido-PEG3-SS-NHS | 95.0% | 436.50 | C15H24N4O7S2 | 5 MG
Azido-PEG3-SS-NHS is a cleavable three-unit polyethylene glycol (PEG) linker intended for bioconjugation and antibody-drug conjugate synthesis. It contains an azide for click chemistry, a disulfide bond for reductive cleavage, and an N-hydroxysuccinimide (NHS) ester for amine coupling.
- Contains azide for copper-catalyzed and strain-promoted click reactions.
- Contains NHS ester for efficient conjugation to primary amines.
- Includes a cleavable disulfide spacer for intracellular release.
- Suitable for linker design in ADC, PROTAC, and other bioconjugation workflows.
- Supplied as a liquid, colorless to light yellow, with reported purity of 95.0%.
Medchemexpress LLC Sulfo-cyanine7 NHS ester (TEA) | 95.8% | 907.15 g/mol | C47H62N4O10S2 | 10 MG
Sulfo-Cyanine7 NHS ester (TEA) is a sulfonated near-infrared fluorescent dye supplied as an NHS-activated ester (triethylammonium salt) for covalent labeling of primary amines on proteins and peptides. It enables strong NIR fluorescence for in vitro labeling, imaging, and assay development, and is supplied as a stable solid with recommended cold, dry storage.
- Amine-reactive NHS ester for stable covalent conjugation.
- Near-infrared fluorescence suitable for imaging and detection.
- Water-soluble sulfonated dye for improved solubility.
- Supplied as a solid; store sealed at 4°C and protect from light.
- High purity appropriate for labeling applications.
Medchemexpress LLC CA125 Human Biotin 50ug | 50ug
The CA125 protein acts by binding to MSLN and plays a crucial role in forming a protective and lubricating barrier on mucosal surfaces This interaction promotes heterotypic cell adhesion and is suggested to play an important role in peritoneal metastasis of ovarian cancer CA125 Protein Human (Biotinylated HEK293 His-Avi) is the recombinant human-derived CA125 protein expressed by HEK293 with C-Avi C-His labeled tag
eMolecules Chem-Impex DBCO-NHS ester 5mg 490843457 33411 0 000 1353016-71-3 MFCD24386367 402 406 C23H18N2O5
Chem-Impex DBCO-NHS ester 5mg 490843457 33411 0 000 1353016-71-3 MFCD24386367 402 406 C23H18N2O5
Medchemexpress LLC PCSK9 Human Biotin 100ug
The PCSK9 protein is an important regulator of plasma cholesterol homeostasis affecting LDL receptor family members such as LDLR and VLDLR It promotes their intracellular degradation and enhances hepatic LDLR degradation through non-proteolytic mechanisms PCSK9 Protein Human (Biotinylated V474I G670E HEK293 Avi) is the recombinant human-derived PCSK9 protein expressed by HEK293 with C-Avi labeled tag and V474I G670E mutation
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 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 Amino-PEG11-alcohol | 15332-94-2 | | 1g
Broadpharm | Amino-PEG11-alcohol | 1g | 368397807 | BP-23798 | 98.000 | 15332-94-2 | | 501.614 | C22H47NO11
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Medchemexpress LLC IL-13 Human Biotin 100ug
IL-13 protein is a cytokine involved in allergic inflammation immune response to parasites and B cell proliferation IL-13 Protein Human (Biotinylated HEK293 Avi-His) is the recombinant human-derived IL-13 protein expressed by HEK293 with C-Avi C-6 His labeled tag