Biotin and derivatives
Medchemexpress LLC IL-12 Human Biotin 20ug | 20ug
IL-35 protein plays a key role in immune regulation forming IL-12 cytokine with IL12B or IL-35 cytokine with EBI3/IL27B IL-12 modulates T cell and natural killer cell responses and induces interferon gamma production IL-12 Protein Human (Biotinylated HEK293 His-Avi) is a recombinant protein dimer complex containing human-derived IL-12 protein expressed by HEK293 with C-Avi C-His labeled tag IL-12 Protein Human (Biotinylated HEK293 His-Avi) has molecular weight of 40-45 kDa
TARGETMOL CHEMICALS INC Biotin-azide 5MG
Also available in 1 mL, 2 mg, 10 mg, 25 mg, 50 mg, 100 mg, 500 mg and bulk. Please contact Fisher for quotes. Biotin-azide (N-(3-Azidopropyl)biotinamide) is used for preparing various biotin affixes and identifying proteins. Purity 99.69%
Medchemexpress LLC B7-H4 Human Biotin 100ug | 100ug
The B7-H4 protein acts as a negative regulator inhibiting T cell-mediated immune responses including activation proliferation cytokine production and cytotoxicity When expressed on tumor macrophages it cooperates with regulatory T cells to suppress tumor-associated antigen-specific T cell immunity B7-H4 Protein Human (Biotinylated HEK293 His-Avi) is the recombinant human-derived B7-H4 protein expressed by HEK293 with C-Avi C-His labeled tag
Medchemexpress LLC Azido-PEG8-NHS ester | 1204834-00-3 | 98.0% | 564.6 g/mol | C23H40N4O12 | 25 MG
Azido-PEG8-NHS ester is an 8-unit polyethylene glycol (PEG) bifunctional linker bearing an azide on one terminus and an N-hydroxysuccinimide (NHS) ester on the other. It is used for bioconjugation: the azide enables azide-alkyne cycloaddition (copper-catalyzed or strain-promoted), while the NHS ester reacts with primary amines to form stable amide bonds.
- Azide enables copper-catalyzed and strain-promoted click chemistry.
- N-hydroxysuccinimide ester labels primary amines (for lysine and amine-modified substrates).
- PEG8 spacer increases hydrophilicity and improves solubility in organic and mixed solvents.
- Soluble in DMSO, dichloromethane, and DMF.
- Commonly used as an ADC or PROTAC linker and general bioconjugation reagent.
- Store at -20 °C to preserve stability.
![Medchemexpress LLC Succinimidyl 6-[3-(2-pyridyldithio)propionamido]hexanoate | 158913-22-5 | MFCD00083163 | 98.1% | 425.52 | C18H23N3O5S2 | 100MG](https://assets.fishersci.com/TFS-Assets/CCG/product-images/5000235572.png-250.jpg)
Medchemexpress LLC Succinimidyl 6-[3-(2-pyridyldithio)propionamido]hexanoate | 158913-22-5 | MFCD00083163 | 98.1% | 425.52 | C18H23N3O5S2 | 100MG
SPDP-C6-NHS ester is a heterobifunctional alkyl/ether-based linker bearing an N-hydroxysuccinimide (NHS) ester and a pyridyldithiol moiety, designed for bioconjugation and assembly of bifunctional molecules such as PROTACs. The NHS ester enables amine coupling to form stable amide bonds, while the pyridyldithiol group allows disulfide formation with thiols, providing modular chemistry for linking ligands, payloads, or proteins.
Medchemexpress LLC Bis-PEG13-NHS ester | 2221949-00-2 | 98.0% | 884.92 g/mol | C38H64N2O21 | 25 MG
Bis-PEG13-NHS ester is a PEG-based N-hydroxysuccinimide (NHS) ester linker for research use in the synthesis of antibody-drug conjugates (ADCs) and proteolysis targeting chimeras (PROTACs).
- Provides a bifunctional PEG13 spacer for conjugation to amines.
- Reactive NHS ester termini enable efficient coupling.
- High purity suitable for research applications.
- Molecular weight approximately 884.92 g/mol; molecular formula C38H64N2O21.
- Available in small pack sizes for research-scale synthesis.
Medchemexpress LLC L-biotin | 21788-37-4 | 99.7% | 244.31 g/mol | C10H16N2O3S | 50 MG
L-biotin is the unnatural enantiomer of biotin supplied as a high-purity research reagent for laboratory use (not for human or clinical applications).
- High purity (reported 99.5-99.7%).
- Cas number 21788-37-4.
- Molecular weight 244.31 g/mol.
- Chemical formula C10H16N2O3S.
- Available in small milligram quantities such as 50 MG.
Medchemexpress LLC L-Biotin | 21788-37-4 | 99.5% | 244.31 g/mol | C10H16N2O3S | 5 MG
L-Biotin is the unnatural enantiomer of biotin supplied for research use. It is provided as a solid and as a 10 mM solution in DMSO, with analytical and safety documentation available.
- High reported purity (≈99.5%).
- Available in small solid quantities (5 mg, 10 mg, 25 mg) and solution form.
- Suitable as a biochemical reagent and reference compound for in vitro assays.
- COA and SDS provided for quality and safety information.
Medchemexpress LLC Sulfo-TAG NHS ester (disodium) | 482618-42-8 | 88.4% | 1185.12 g/mol | C43H39N7Na2O16RuS4 | 1 MG
Sulfo-TAG NHS ester (disodium) is a water-soluble N-hydroxysuccinimide (NHS) ester reagent for covalent labeling of proteins and antibodies via primary amine groups. The reagent contains a ruthenium-based electrochemiluminescent tag that enables sensitive electrochemiluminescence (ECL) detection when conjugated to antibodies. Supplied as a solid for research use; handle and store according to the supplier's SDS and COA.
- Couples to primary amine groups on proteins and antibodies for stable conjugation.
- Enables electrochemiluminescence (ECL) detection when attached to antibodies.
- Water-soluble formulation suitable for aqueous conjugation reactions.
- Provided with storage recommendations to maintain stability.
- Supplied with certificate of analysis (COA) and safety data sheet (SDS) specifying purity and molecular data.
![eMolecules Medchem Express / N-piperidine Ibrutinib (hydrochloride) / 5mg / 600899891 / HY-130983 / / 2231747-18-3 / [null] / 422.920 / C22H23ClN6O](https://assets.fishersci.com/TFS-Assets/CCG/product-images/502465889.JPG-250.jpg)
eMolecules Medchem Express / N-piperidine Ibrutinib (hydrochloride) / 5mg / 600899891 / HY-130983 / / 2231747-18-3 / [null] / 422.920 / C22H23ClN6O
Medchem Express / N-piperidine Ibrutinib (hydrochloride) / 5mg / 600899891 / HY-130983 / / 2231747-18-3 / [null] / 422.920 / C22H23ClN6O