Biotin and derivatives
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 Alexa fluor 647 NHS ester | 1620475-28-6 | 95.0% | 942.06 g/mol | C39H47N3O16S4 | 10 MG
Alexa Fluor 647 NHS ester is a far-red, amine-reactive fluorescent dye (succinimidyl ester) used to covalently label primary amines on proteins, peptides, and amine-modified oligonucleotides for fluorescence imaging and flow cytometry.
- Far-red, bright, and photostable fluorescent dye suitable for imaging and flow cytometry.
- Amine-reactive NHS (succinimidyl) ester enables covalent labeling of primary amines.
- Compatible with proteins, peptides, and amine-modified oligonucleotides.
- High purity (95.0%) for reliable conjugation performance.
- Supplied as a solid; store sealed at -20°C, protected from moisture and light.
- COA, SDS, and handling documents available to support safe use and quality verification.
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
Medchemexpress LLC Biotin methyl ester 1g
Biotin methyl ester is a biochemical reagent that can be used as a biological material or organic compound for life science related research
Medchemexpress LLC Dbco-biotin | 1418217-95-4 | MFCD22380751 | 98.5% | 502.63 g/mol | C28H30N4O3S | 25MG
DBCO-Biotin is a copper-free click chemistry reagent that installs a biotin tag on azide-functionalized biomolecules via strain-promoted alkyne-azide cycloaddition (SPAAC). Supplied as a white powder, it is used for bioconjugation, affinity purification and detection, and as a linker component in targeted degrader synthesis. Store at -20 °C, protect from light, and maintain under inert atmosphere when possible.
- Enables copper-free SPAAC bioconjugation to azide-labeled targets.
- Introduces a biotin affinity handle for pull-down and detection assays.
- High purity suitable for analytical and preparative applications.
- Stable solid form when stored at -20 °C and protected from light.
- Compatible with proteins, peptides, and other biomolecules.
Medchemexpress LLC m-PEG1-NHS ester 5g | 1027371-75-0 | 201.18 g/mol | C8H11NO5 | 5 G
m-PEG1-NHS ester is a methoxy-terminated PEG1 N-hydroxysuccinimide ester that provides an activated NHS ester for efficient coupling to primary amines. It is used as a short PEG linker in bioconjugation and PROTAC synthesis to introduce a flexible spacer and enable amide bond formation under mild conditions.
- Provides a methoxy-terminated PEG1 spacer for minimal linker length.
- Contains an active NHS ester for rapid amide coupling to primary amines.
- Suitable for PROTAC linker assembly and general bioconjugation.
- Available in multiple pack sizes for flexible scaling.