Protein Modification Reagents
Gold Biotechnology Inc Guanidine HCl 5 kg
Guanidine HCl is a freely soluble chaotropic agent routinely used for protein denaturation and folding.
Medchemexpress LLC DBCO-C3-amide-PEG6-NHS ester | 95.2% | 751.82 | 5 MG
DBCO-C3-amide-PEG6-NHS ester is a click chemistry PEG reagent. It contains an NHS ester that reacts specifically with primary amines, such as the side chains of lysine residues or aminosilane-coated surfaces, under neutral or slightly alkaline conditions to form covalent bonds. It also contains a DBCO group which can undergo strain-promoted alkyne-azide cycloaddition (SPAAC) with molecules containing Azide groups.
- Contains an NHS ester that reacts with primary amines
- Forms covalent bonds under neutral or slightly alkaline conditions
- Features a DBCO group for strain-promoted alkyne-azide cycloaddition (SPAAC)
- Suitable for reactions with molecules containing azide groups
eMolecules Broadpharm / BDP FL-PEG5-propargyl / 1mg / 340377011 / BP-23467 / 98.000 / 2093197-93-2 / MFCD30723294 / 549.420 / C27H38BF2N3O6
Broadpharm / BDP FL-PEG5-propargyl / 1mg / 340377011 / BP-23467 / 98.000 / 2093197-93-2 / MFCD30723294 / 549.420 / C27H38BF2N3O6
![eMolecules Broadpharm / 16-(Azide-PEG3-ethylcarbamoyl)pentadecanoic-t-butyl ester / 100mg / 784454990 / BP-29797 / 95.000 / / [null] / 542.762 / C28H54N4O6](https://assets.fishersci.com/TFS-Assets/CCG/product-images/502473326.JPG-250.jpg)
eMolecules Broadpharm / 16-(Azide-PEG3-ethylcarbamoyl)pentadecanoic-t-butyl ester / 100mg / 784454990 / BP-29797 / 95.000 / / [null] / 542.762 / C28H54N4O6
Broadpharm / 16-(Azide-PEG3-ethylcarbamoyl)pentadecanoic-t-butyl ester / 100mg / 784454990 / BP-29797 / 95.000 / / [null] / 542.762 / C28H54N4O6
Broadpharm Azido-PEG12-acid | 1167275-20-3 | 1g
Azido-PEG12-acid | Putity: 98% | MW: 643.7 | 1167275-20-3 | 1g
Medchemexpress LLC Biotin-PEG4-TFP ester | 2985664-57-9 | MFCD27952880 | 98.2% | C27H37F4N3O8S | 10MG
Biotin-PEG4-TFP ester is a biotinylated PEG4 spacer terminated with a tetrafluorophenyl (TFP) activated ester, formulated for conjugation to primary amines in proteins, peptides, or small molecules. It enables rapid formation of stable amide bonds while providing a hydrophilic linker that reduces steric hindrance and improves solubility. The TFP activated ester offers greater hydrolytic stability than many NHS esters, supporting cleaner bioconjugation and linker assembly workflows.
- Activated TFP ester for efficient coupling to primary amines.
- Biotin tag for affinity capture and detection.
- PEG4 spacer improves solubility and reduces steric hindrance.
- Greater hydrolytic stability than many NHS esters, enabling cleaner conjugations.
- Suitable for protein, peptide, and small-molecule conjugation applications.
![Medchemexpress LLC (2,5-dioxopyrrolidin-1-yl) 2-[2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]ethoxy]acetate | 1807534-82-2 | MFCD28122941 | 96.0% | C14H22N4O8 | 10MG](https://assets.fishersci.com/TFS-Assets/CCG/product-images/5000260865.png-250.jpg)
Medchemexpress LLC (2,5-dioxopyrrolidin-1-yl) 2-[2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]ethoxy]acetate | 1807534-82-2 | MFCD28122941 | 96.0% | C14H22N4O8 | 10MG
Azido-PEG4-NHS-ester is an azide-terminated polyethylene glycol linker with an N-hydroxysuccinimide (NHS) activated ester. It is designed for bioconjugation and PROTAC linker assembly, enabling rapid amide formation with primary amines and subsequent azide-based click chemistry. Supplied in milligram-scale quantities for research use.
- Enables efficient coupling to primary amines via activated NHS ester.
- Provides an azide functionality for click chemistry and downstream modification.
- PEG4 spacer improves solubility and reduces steric hindrance between conjugated partners.
- Suitable for constructing linkers and bioconjugates in medicinal chemistry workflows.
- Available in small milligram-scale packs for research applications.
- Reported purity ~96.0% and molecular weight ~374.35 g/mol.
![eMolecules Broadpharm / 18-(Amine-PEG3-ethylcarbamoyl)heptadecanoic-t-butyl ester / 100mg / 784454994 / BP-29798 / 95.000 / / [null] / 544.818 / C30H60N2O6](https://assets.fishersci.com/TFS-Assets/CCG/product-images/502473325.JPG-250.jpg)
eMolecules Broadpharm / 18-(Amine-PEG3-ethylcarbamoyl)heptadecanoic-t-butyl ester / 100mg / 784454994 / BP-29798 / 95.000 / / [null] / 544.818 / C30H60N2O6
Broadpharm / 18-(Amine-PEG3-ethylcarbamoyl)heptadecanoic-t-butyl ester / 100mg / 784454994 / BP-29798 / 95.000 / / [null] / 544.818 / C30H60N2O6
eMolecules DOTA-PEG5-amine | | | 10mg
Broadpharm | DOTA-PEG5-amine | 10mg | 550804500 | BP-24067 | 98.000 | | | 666.770 | C28H54N6O12
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