Biotin and derivatives
Medchemexpress LLC PD-L1 Mouse Biotin 100ug | 100ug
PD-L1 protein serves as a ligand for the inhibitory receptor PDCD1/PD-1 and is critical for maintaining immune tolerance This interaction modulates T cell activation limits effector responses and may stimulate IL10-producing T cell subsets PD-L1 Protein Mouse (Biotinylated HEK293 His) is the recombinant mouse-derived PD-L1 protein expressed by HEK293 with C-His labeled tag
eMolecules 55750-61-3 | A-MALEIMIDOACETIC ACID-NHS(AMAS) | AstaTech | MFCD00133523 | 252.182 | C10H8N2O6 | 97.000 | O=C(CN1C(=O)C=CC1=O)ON1C(=O)CCC1=O | 25g | 881785810
A-MALEIMIDOACETIC ACID-NHS(AMAS) | AstaTech | 55750-61-3 | MFCD00133523 | 252.182 | C10H8N2O6 | 97.000 | O=C(CN1C(=O)C=CC1=O)ON1C(=O)CCC1=O | 25g | 881785810
![Medchemexpress LLC 2,5-pyrrolidinedione, 1,1'-[1,2-ethanediylbis[oxy(1-oxo-3,1-propanediyl)oxy]]bis- (9CI) | 65869-63-8 | 99.2% | 400.34 g/mol | C16H20N2O10 | 250 MG](https://assets.fishersci.com/TFS-Assets/CCG/product-images/5000203007.png-250.jpg)
Medchemexpress LLC 2,5-pyrrolidinedione, 1,1'-[1,2-ethanediylbis[oxy(1-oxo-3,1-propanediyl)oxy]]bis- (9CI) | 65869-63-8 | 99.2% | 400.34 g/mol | C16H20N2O10 | 250 MG
Bis-PEG2-NHS ester is a noncleavable two-unit polyethylene glycol (PEG) linker bearing N-hydroxysuccinimide (NHS) ester reactive groups at both ends, designed for antibody-agent conjugation via amine-coupling chemistry for research use.
- Noncleavable two-unit PEG linker for antibody-agent conjugation.
- N-hydroxysuccinimide (NHS) ester reactive groups for amine coupling.
- High purity, 99.2%.
- Molecular weight 400.34 g/mol.
- Soluble in DMSO at 100 mg/mL; ultrasonic agitation may be required.
- Storage: powder at -20°C; in solvent -80°C for 6 months, -20°C for 1 month.
- Available in multiple pack sizes, including 250 MG.
![Medchemexpress LLC Succinimidyl 6-[3-(2-pyridyldithio)propionamido]hexanoate | 158913-22-5 | MFCD00083163 | 98.1% | 425.52 g/mol | C18H23N3O5S2 | 1G](https://assets.fishersci.com/TFS-Assets/CCG/product-images/5000238902.png-250.jpg)
Medchemexpress LLC Succinimidyl 6-[3-(2-pyridyldithio)propionamido]hexanoate | 158913-22-5 | MFCD00083163 | 98.1% | 425.52 g/mol | C18H23N3O5S2 | 1G
Succinimidyl 6-[3-(2-pyridyldithio)propionamido]hexanoate is an alkyl/ether-based PROTAC linker containing an N-hydroxysuccinimide (NHS) ester for amine coupling and a pyridyldisulfide moiety for thiol-directed conjugation. It is used in PROTAC and bioconjugation synthesis and features a reducible disulfide that enables controlled cleavage in downstream applications.
- Provides an NHS ester for efficient conjugation to primary amines.
- Contains a pyridyldisulfide cleavable disulfide for thiol chemistry.
- Suitable as a linker in PROTAC and bioconjugation synthesis.
- Molecular formula C18H23N3O5S2; molecular weight 425.52 g/mol.
- Soluble in DMSO at approximately 50 mg/mL; may require sonication.
- Store powder at -20°C for long-term stability; solvent solutions require low-temperature storage.
- High purity (98.1%) suitable for research applications.
eMolecules 756525-90-3 | m-PEG8-NHS ester | Ambeed | MFCD13184969 | 509.549 | C22H39NO12 | 98.000 | COCCOCCOCCOCCOCCOCCOCCOCCC(=O)ON1C(=O)CCC1=O | 1g | 714088005
m-PEG8-NHS ester | Ambeed | 756525-90-3 | MFCD13184969 | 509.549 | C22H39NO12 | 98.000 | COCCOCCOCCOCCOCCOCCOCCOCCC(=O)ON1C(=O)CCC1=O | 1g | 714088005
![Medchemexpress LLC (1R,8S,9S)-bicyclo[6.1.0]non-4-yn-9-ylmethyl 2,5-dioxopyrrolidin-1-yl carbonate. | 1426827-79-3 | MFCD19705416 | 99.5% | 291.30 g/mol | C15H17NO5 | 100 MG](https://assets.fishersci.com/TFS-Assets/CCG/product-images/5000299394.png-250.jpg)
Medchemexpress LLC (1R,8S,9S)-bicyclo[6.1.0]non-4-yn-9-ylmethyl 2,5-dioxopyrrolidin-1-yl carbonate. | 1426827-79-3 | MFCD19705416 | 99.5% | 291.30 g/mol | C15H17NO5 | 100 MG
Endo-BCN-NHS carbonate is a succinimidyl carbonate reagent that installs bicyclo[6.1.0]non-4-yn (BCN) handles onto primary amines, enabling strain-promoted azide-alkyne cycloaddition (SPAAC) for copper-free click crosslinking. It is used to functionalize proteins and elastin-like polymers for hydrogel formation and cell-encapsulation studies.
- High purity (99.54%).
- Molecular formula C15H17NO5, molecular weight 291.30 g/mol.
- Reacts with primary amines to introduce BCN handles for SPAAC crosslinking.
- Appearance: white to light yellow solid.
- Recommended storage: powder at -20°C; in solvent: -80°C (6 months) or -20°C (1 month).
- Available in multiple package sizes including 100 mg.
Medchemexpress LLC Norbornene-NHS | 1888335-48-5 | C12H13NO5 | 25 MG
Norbornene-NHS is a dienophile click chemistry reagent used for conjugation via copper-free click reaction with tetrazines. It is intended for research use only.
- Click chemistry reagent
- Dienophile for conjugation via copper-free click reaction with tetrazines
Medchemexpress LLC IL-13 Human Biotin 20ug
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
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
eMolecules 1353016-71-3 | DBCO-NHS ester | Knight Chemicals, Inc. | MFCD24386367 | 402.406 | C23H18N2O5 | 99.000 | O=C(CCC(=O)N1Cc2ccccc2C#Cc2ccccc12)ON1C(=O)CCC1=O | 5g | 894265339
DBCO-NHS ester | Knight Chemicals, Inc. | 1353016-71-3 | MFCD24386367 | 402.406 | C23H18N2O5 | 99.000 | O=C(CCC(=O)N1Cc2ccccc2C#Cc2ccccc12)ON1C(=O)CCC1=O | 5g | 894265339
eMolecules 1353016-71-3 | DBCO-NHS ester | Knight Chemicals, Inc. | MFCD24386367 | 402.406 | C23H18N2O5 | 99.000 | O=C(CCC(=O)N1Cc2ccccc2C#Cc2ccccc12)ON1C(=O)CCC1=O | 1g | 894265338
DBCO-NHS ester | Knight Chemicals, Inc. | 1353016-71-3 | MFCD24386367 | 402.406 | C23H18N2O5 | 99.000 | O=C(CCC(=O)N1Cc2ccccc2C#Cc2ccccc12)ON1C(=O)CCC1=O | 1g | 894265338
Medchemexpress LLC L-biotin | 21788-37-4 | 99.7% | 244.31 g/mol | C10H16N2O3S | 10 MG
L-biotin is the unnatural enantiomer of biotin provided as a research-grade chemical standard for stereochemical studies and analytical applications. It is supplied with a certificate of analysis and a safety data sheet to support safe handling and quality verification.
- high reported purity suitable for analytical use
- available in small milligram pack sizes for research
- comes with COA and SDS documentation
- chemical formula C10H16N2O3S and molecular weight 244.31 g/mol
- intended for research use only; not for human use
Medchemexpress LLC Cy3B NHS ester | 228272-52-4 | 97.75% | 657.73 | 5 MG
Cy3B NHS ester is a fluorescent dye compound utilized in biomarking and fluorescent labeling experiments. It is specifically used for labeling biomolecules that contain amino functional groups (amine groups), such as proteins, antibodies, or peptides.
- Used for biomarking and fluorescent labeling experiments.
- Labels biomolecules containing amino functional groups (amine groups), such as proteins, antibodies, or peptides.