Biotin and derivatives
Medchemexpress LLC Diazo biotin-PEG3-azide | 1339202-33-3 | MFCD28334530 | 95.5% | C33H45N9O7S | 10MG
Diazo biotin-PEG3-azide is a multifunctional PEG3 linker combining a cleavable diazo functional group, a biotin affinity tag, and an azide reactive handle. It is designed for efficient biotinylation and capture of alkyne-bearing biomolecules using click chemistry and for use as a linker in chemical biology workflows.
- Provides azide functionality for CuAAC and SPAAC click reactions.
- Includes a biotin tag for affinity purification and detection.
- Contains a diazo group enabling photo-cleavage or crosslinking.
- PEG3 spacer improves solubility and reduces steric hindrance.
- Suitable for biotinylation, pull-down assays, and linker synthesis.
Apexbio Technology LLC Sulfo-NHS-LC-Biotin, 100mg. Cas: 127062-22-0 MFCD: MFCD00078534. Amine-reactive biotinylation reagent, long chain
Intermediate length, water-soluble biotinyltation reagent used to attach biotin to primary amines 127062-22-0. MFCD00078534
Medchemexpress LLC Biotin methyl ester 250mg
Biotin methyl ester is a biochemical reagent that can be used as a biological material or organic compound for life science related research
Apexbio Technology LLC Sulfo-NHS-LC-D-Desthiobiotin 5X1mg
Sulfo-NHS-LC-D-Desthiobiotin is a sulfonated amine-reactive labeling reagent targeting primary amines on proteins or peptides It is designed to covalently label cell-surface proteins by reacting with lysine residues or protein N-termini thereby enabling selective modification of these proteins Sulfo-NHS-LC-D-Desthiobiotin exerts its biological activity primarily through covalent reaction with primary amines via its activated Sulfo-NHS ester Due to its membrane-impermeable negatively charged sulfonate group it selectively labels cell-surface proteins without entering intact cells Based on these chemical properties Sulfo-NHS-LC-D-Desthiobiotin holds research potential in affinity purification biotin-streptavidin interaction assays selective enrichment and analytical workflows involving reversible labeling of surface proteins
Medchemexpress LLC L-biotin (unnatural enantiomer of biotin) | 21788-37-4 | MFCD22373639 | 99.5% | 244.31 g·mol⁻¹ | C10H16N2O3S | 1 ML
L-biotin is the unnatural enantiomer of biotin supplied as a research reagent. It binds streptavidin in vitro and is provided as a ready-to-use 10 mM solution in DMSO (1 mL) or as solid powder in multiple pack sizes. Recommended storage conditions are -20°C for powder, and -80°C for stock solutions (up to 6 months).
- Unnatural enantiomer of biotin
- Binds streptavidin in vitro
- Available as 10 mM DMSO solution or solid powder
- High purity (>99%)
- Soluble in DMSO at high concentration
- Powder storage: -20°C; stock solution storage: -80°C (6 months)
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 Nhs-peg2-ss-peg2-nhs | 2640393-71-9 | 96.7% | 580.63 | C22H32N2O12S2 | 10 MG
NHS-PEG2-SS-PEG2-NHS is a cleavable four-unit polyethylene glycol (PEG) linker bearing N-hydroxysuccinimide (NHS) esters at both termini. It is designed for use in bioconjugation workflows, including the synthesis of antibody-drug conjugates (ADCs), providing a reducible disulfide-containing spacer to improve solubility and enable payload release under reducing conditions.
- Cleavable disulfide-containing PEG spacer for controlled payload release.
- Terminal NHS esters for efficient conjugation to amines.
- Four-unit PEG improves aqueous solubility of conjugates.
- Suitable for ADC synthesis and general bioconjugation workflows.
- Intended for research use; handle according to safety data sheet instructions.
eMolecules Z-Gly-ONp | 1738-86-9 | MFCD00024663 | 1g
Combi-Blocks | Z-Gly-ONp | 1g | 335350486 | QB-6326 | 97.000 | 1738-86-9 | MFCD00024663 | 330.296 | C16H14N2O6
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Medchemexpress LLC m-PEG-NHS ester | 92451-01-9 | MFCD06412227 | 90.0% | 350 g/mol | (C2H4O)nC7H9NO5 | 10 MG
m-PEG-NHS ester (MW 350) is a methoxy-terminated polyethylene glycol activated as an N-hydroxysuccinimide (NHS) ester for covalent PEGylation of primary amine-containing molecules. It is intended to improve solubility and stability, reduce immunogenicity, and enable bioconjugation and surface functionalization in research applications.
- Activated NHS ester for efficient coupling to primary amines.
- Methoxy termination prevents crosslinking and limits multi-attachment.
- Improves solubility and stability of biomolecules.
- Reduces immunogenicity and can extend circulation half-life.
- Suitable for protein, peptide, and small-molecule PEGylation.
- Available in small mg-scale quantities for research use.