Biotin and derivatives
Medchemexpress LLC Azido-PEG24-NHS ester | 2375600-46-5 | 95.0% | C55H104N4O28 | 25 MG
Azido-PEG24-NHS ester is a PEG-based PROTAC linker utilized in the synthesis of PROTACs. It functions as a click chemistry reagent, containing an Azide group that can participate in copper-catalyzed azide-alkyne cycloaddition (CuAAc) reactions with alkyne-containing molecules. Additionally, it can undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules possessing DBCO or BCN groups.
- PEG-based PROTAC linker
- Utilized in the synthesis of PROTACs
- Functions as a click chemistry reagent
- Contains an Azide group
- Can participate in copper-catalyzed azide-alkyne cycloaddition (CuAAc) reactions with alkyne-containing molecules
- Can undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules possessing DBCO or BCN groups
Medchemexpress LLC AMT-NHS | 2925268-86-4 | 98.7% | 443.47 g·mol⁻¹ | C22H21NO7S | 10 MG
AMT-NHS is an RNA-protein crosslinker that combines a psoralen intercalator with an N-hydroxysuccinimide (NHS) ester to covalently capture RNA-protein interactions. It is cell-permeable and has been used in living cells to map diverse RNA-protein contacts, producing distinct crosslinking patterns for single- and double-stranded RNA regions.
- Enables dual reactivity: psoralen-mediated photo-crosslinking of RNA and NHS-ester conjugation to protein amines.
- Cell-permeable for in vivo crosslinking applications.
- Soluble in DMSO at high concentration; may require warming and sonication to dissolve.
- High supplied purity supports reproducible crosslinking experiments.
- Stable as a powder under low-temperature storage; solution storage times are defined for sample handling.
Medchemexpress LLC Amine-PEG3-Biotin | 359860-27-8 | 99.8% | 418.55 | 100 MG
Amine-PEG3-Biotin is a signal amplification label that contains a biotin group and a terminal primary amine group.
- Signal amplification label.
- Contains a biotin group.
- Contains a terminal primary amine group.
- Used in electrochemical immunosensors for N6-methyladenosine detection in human cell lines based on a biotin-streptavidin system and silver-SiO2 signal amplification.
eMolecules 1353016-71-3 | DBCO-NHS ester | Chem-Impex | MFCD24386367 | 402.406 | C23H18N2O5 | 97.000 | O=C(CCC(=O)N1Cc2ccccc2C#Cc2ccccc12)ON1C(=O)CCC1=O | 25mg | 490843458
DBCO-NHS ester | Chem-Impex | 1353016-71-3 | MFCD24386367 | 402.406 | C23H18N2O5 | 97.000 | O=C(CCC(=O)N1Cc2ccccc2C#Cc2ccccc12)ON1C(=O)CCC1=O | 25mg | 490843458
Medchemexpress LLC Azido-PEG5-NHS ester | 1433996-86-1 | ≥98.0% | C17H28N4O9 | 100 MG
Azido-PEG5-NHS ester is a PEG-based PROTAC linker primarily used in the synthesis of PROTACs. It acts as a versatile click chemistry reagent, incorporating an azide group that facilitates copper-catalyzed azide-alkyne cycloaddition (CuAAc) with alkyne-containing molecules. This compound also supports strain-promoted alkyne-azide cycloaddition (SPAAC) reactions when used with molecules containing DBCO or BCN groups. It is intended for research use only.
- PEG-based PROTAC linker
- Utilized in the synthesis of PROTACs
- Functions as a click chemistry reagent
- Contains an azide group
- Participates in copper-catalyzed azide-alkyne cycloaddition reactions (CuAAc)
- Undergoes strain-promoted alkyne-azide cycloaddition (SPAAC) reactions
Medchemexpress LLC Cy3 NHS ester | 1393363-07-9 | MFCD28505569 | 99.5% | 590.15 g/mol | C34H40ClN3O4 | 5 MG
Cy3 NHS ester is a cyanine-based fluorescent labeling reagent that reacts with primary amines to covalently label proteins, peptides, antibodies, and small molecules for fluorescence imaging and detection. Supplied as a solid with high purity and good DMSO solubility, it is designed for reliable bioconjugation workflows and fluorescence-based assays.
- Reactive NHS ester for efficient amine coupling.
- Strong fluorescence with excitation ≈550 nm and emission ≈570 nm.
- High purity suitable for sensitive bioconjugation.
- Soluble in DMSO (about 125 mg/mL) for easy stock preparation.
- Stable when stored protected from light at -20°C; in solution, store at -80°C for long-term.
eMolecules 1688598-83-5 | Ambeed | Bis(25-dioxopyrrolidin-1-yl) (disulfanediylbis(ethane-21-diyl)) dicarbonate | 100mg | 571782781 | A1192322 | 436.41 | C14H16N2O10S2
Ambeed | (4R5R)-45-Diphenyl-2-(quinolin-2-yl)-45-dihydrooxazole | 250mg | 627733199 | A1350006 | 2417321-38-9 | 350.421 | C24H18N2O
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Medchemexpress LLC m-PEG-NHS ester (MW 5000) | 92451-01-9 | 95.0% | (C2H4O)nC7H9NO5 | 50 MG
m-PEG-NHS ester (MW 5000) is a PEG-based PROTAC linker utilized in the synthesis of PROTACs. This solid, white to off-white compound boasts a purity of 95.0% and is intended strictly for research purposes.
- PEG-based PROTAC linker
- Used in the synthesis of PROTACs
- For research use only
- Solid appearance
- White to off-white color
- 95.0% purity
Medchemexpress LLC Amino-PEG11-amine | 479200-82-3 | 95.0% | 100 MG
Amino-PEG11-amine is a PEG-based PROTAC linker designed to combine mono diethylstilbestrol (DES)-based ligands. This offers an alternative approach for creating more selective and active ER antagonists, useful in the endocrine treatment of breast cancer. The product appears as an oil with a white to off-white color. Its molecular weight is 544.68 and its formula is C24H52N2O11. This product is for research use only and not for sale to patients.
- PEG-based PROTAC linker
- Combines mono diethylstilbestrol (DES)-based ligands
- Supports development of selective ER antagonists
- Potential for breast cancer endocrine therapy
- Appears as an oil
- Color: white to off-white
- Molecular weight: 544.68
- Chemical formula: C24H52N2O11
- For research use only
eMolecules 1807518-72-4 | Mal-PEG1-NHS ester | Broadpharm | MFCD26127783 | 310.262 | C13H14N2O7 | 0.000 | O=C(CCOCCN1C(=O)C=CC1=O)ON1C(=O)CCC1=O | 1g | 802656011
Mal-PEG1-NHS ester | Broadpharm | 1807518-72-4 | MFCD26127783 | 310.262 | C13H14N2O7 | 0.000 | O=C(CCOCCN1C(=O)C=CC1=O)ON1C(=O)CCC1=O | 1g | 802656011
Medchemexpress LLC m-PEG1-NHS ester 1g | 1027371-75-0 | 201.18 g/mol | 1 G
m-PEG1-NHS ester is a methoxy-terminated polyethylene glycol N-hydroxysuccinimide (NHS) ester used as a short PEG linker and an amine-reactive coupling reagent for bioconjugation and linker assembly in medicinal chemistry.
- Amine-reactive NHS ester for efficient conjugation to primary amines.
- Short PEG spacer (approx. 201.18 g/mol) that improves solubility and reduces steric hindrance.
- Supplied as a solid with recommended powder storage at -20°C to maintain stability.
- Soluble in water and PBS with ultrasonic warming; H2O 33.33 mg/mL, PBS 100 mg/mL.
- Purity reported as 95.0% for typical batches.
Medchemexpress LLC N3-peg3-c2-nhs ester | 1245718-89-1 | MFCD23726613 | 99.9% | 344.32 g/mol | C13H20N4O7 | 10 G
Azide-terminated PEG3 NHS ester linker for bioconjugation and click-chemistry labeling. The reagent contains an azide group for copper-catalyzed azide-alkyne cycloaddition (CuAAC) and is compatible with strain-promoted alkyne-azide cycloaddition (SPAAC). It is supplied as a high-purity NHS ester for amine conjugation and includes a three-unit PEG spacer to improve solubility and reduce steric hindrance.
- Azide functional group for click chemistry reactions.
- NHS ester for efficient conjugation to primary amines.
- Three-unit PEG spacer to enhance solubility.
- Noncleavable linker for stable conjugation.
- High purity suitable for research applications.
- Available in laboratory-scale 10 g packaging.
![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 | C16H20N2O10 | 5 G](https://assets.fishersci.com/TFS-Assets/CCG/product-images/5000203833.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 | C16H20N2O10 | 5 G
Bis-PEG2-NHS ester is a non-cleavable two-unit polyethylene glycol (PEG) linker designed for antibody-agent conjugation (ADC). It contains an N-hydroxysuccinimide (NHS) ester reactive group for efficient amine coupling and is supplied as a white to off-white solid.
- Non-cleavable two-unit PEG linker
- NHS-ester functional group for amine coupling
- High purity suitable for conjugation chemistry
- Available in multiple pack sizes, including 5 G
- Powder storage: -20°C for up to 3 years
Medchemexpress LLC LAIR1 Human Biotin 100ug
LAIR1 protein has a negative regulatory effect on NK cells B cells and T cells It activates the phosphatases PTPN6 and PTPN11 inhibits calcium increases in B cells and regulates cytokine production in CD4 T cells LAIR1 Protein Human (Biotinylated HEK293 Avi-His) is the recombinant human-derived LAIR1 protein expressed by HEK293 with C-Avi C-6 His labeled tag
Medchemexpress LLC Cyanine5.5 NHS ester chloride | 1469277-96-0 | MFCD28385524 | 95.7% | 716.31 g·mol-1 | C44H46ClN3O4 | 5 MG
Cyanine5.5 NHS ester chloride is a near-infrared reactive dye supplied as a solid NHS-activated ester that covalently labels primary amines in proteins, peptides, antibodies, and small molecules for fluorescence detection and imaging. The reagent is provided with analytical documentation to support purity and identity.