Biotin and derivatives
Advanced Chem Tech Biotin-OSu, Advanced ChemTech
Molecular Weight (g/mol): 341.38
Advanced Chem Tech Succinimidyl 6- biotinamido he, Advanced ChemTech
Molecular Weight (g/mol): 454.5
IBA LifeSciences Biotin powder; 5 g
Biotin is a water-soluble B-complex vitamin, also known as vitamin B7 or vitamin H. It binds to the biotin-binding pockets of streptavidin, Strep-Tactin, and Strep-TactinXT with different affinities. As a result, it allows the efficient elution of Strep-tagII or Twin-Strep-tag fusion proteins from Strep-TactinXT, while maintaining the reusability of the resin. It can be used for preparation of Strep-TactinXT elution buffer, Buffer BXT. In addition, biotin can be used for elution of biotinylated proteins from Strep-Tactin, where it binds irreversibly to the resin. Hence, Strep-Tactin cannot be regenerated in this kind of application.
IBA LifeSciences Biotin powder; 2 g
Biotin is a water-soluble B-complex vitamin, also known as vitamin B7 or vitamin H. It binds to the biotin-binding pockets of streptavidin, Strep-Tactin, and Strep-TactinXT with different affinities. As a result, it allows the efficient elution of Strep-tagII or Twin-Strep-tag fusion proteins from Strep-TactinXT, while maintaining the reusability of the resin. It can be used for preparation of Strep-TactinXT elution buffer, Buffer BXT. In addition, biotin can be used for elution of biotinylated proteins from Strep-Tactin, where it binds irreversibly to the resin. Hence, Strep-Tactin cannot be regenerated in this kind of application.
Medchemexpress LLC Biotin-PEG3-iodoacetamide | 2306161-26-0 | 97.0% | 10 MG
Biotin-PEG3-iodoacetamide is a PEG-based linker combining a biotin tag, a three-unit PEG spacer, and an iodoacetamide reactive group. It selectively alkylates cysteine residues under mild conditions to introduce a biotin handle for affinity capture, detection, and enrichment workflows.
- Selective cysteine labeling via iodoacetamide chemistry.
- Biotin tag enables high-affinity streptavidin capture.
- PEG3 spacer improves solubility and reduces steric hindrance.
- Suitable for protein labeling, pull-downs, and detection assays.
- Provided as a small-molecule reagent for research use.
eMolecules Hydroxy-PEG11-t-butyl ester | | MFCD29049421 | 1g
Broadpharm | Hydroxy-PEG11-t-butyl ester | 1g | 490840967 | BP-24413 | 98.000 | | MFCD29049421 | 630.769 | C29H58O14
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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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Chem-Impex International, Inc. (+) Biotinyl-6-aminohexanoic acid | 72040-64-3 | MFCD00144853 | 250MG
(+) Biotinyl-6-aminohexanoic acid, 72040-64-3, MFCD00144853, 250MG
Medchemexpress LLC BHQ-2 N-hydroxysuccinimide ester | 916753-62-3 | MFCD28160399 | 97.7% | 603.58 g/mol | C29H29N7O8 | 10 MG
BHQ-2 NHS is a non-emitting quencher containing a polyaromatic-azo backbone with a terminal N-hydroxysuccinimide (NHS) ester. It is designed for covalent labeling of primary amines on proteins and amine-modified oligonucleotides, and for use as an acceptor in fluorescence resonance energy transfer (FRET) and other fluorescence-based assays.
- Provides strong quenching across 560-670 nm.
- NHS ester reacts with primary amines for covalent labeling.
- High purity, approximately 97.7%.
- Molecular weight 603.58 g/mol.
- Suitable for oligonucleotide and protein labeling in FRET assays.
Sigma Aldrich Fine Chemicals Biosciences Biotin 3-sulfo-N-hydroxysu10MG
Biotinavidin second antibody signal systems involve the conjugation of biotin to a secondary antibody. Once the secondary antibody binds to a target primary antibody in an immunochemical assay the signal is developed by allowing avidin which has been conjugated to an enzyme or signal molecule to bind to the antibody associated biotin molecule.
Medchemexpress LLC Methoxy polyethylene glycol N-hydroxysuccinimide ester | 92451-01-9 | 98.0% | 10MG
Methoxy polyethylene glycol N-hydroxysuccinimide ester, average molecular weight 20,000 Da, is an NHS-activated methoxy-PEG reagent that reacts efficiently with primary amines to form stable amide bonds. It is supplied as a solid for research use and is commonly used for PEGylation of peptides and proteins, linker construction in targeted degraders, and general bioconjugation to improve solubility and pharmacokinetic properties.
- Reacts with primary amines to form stable amide linkages.
- Improves solubility and reduces immunogenicity of conjugates.
- Provides a 20 kDa hydrophilic spacer for linker design.
- Supplied as a high-purity reagent suitable for research applications.
- Compatible with standard coupling and purification workflows.
Medchemexpress LLC Rhodamine B NHS ester | 144700-55-0 | 96.9% | 576.08 | C32H34ClN3O5 | 10 MG
Rhodamine B NHS ester is an N-hydroxysuccinimide (NHS) activated fluorescent dye for covalent labeling of primary amines in proteins, peptides, and other biomolecules. It forms stable amide bonds to introduce a rhodamine fluorophore for fluorescence microscopy, flow cytometry, and biochemical assays.
- NHS-activated for efficient and selective amine coupling.
- Bright rhodamine fluorescence suitable for microscopy and flow cytometry.
- Molecular weight 576.08 g/mol and formula C32H34ClN3O5.
- High purity (~96.9%) for reliable labeling performance.
- Available in small research pack sizes for convenient use.