Protein Modification Reagents
Medchemexpress LLC DBCO-NHCO-PEG2-biotin | 2989400-08-8 | 97.1% | C35H43N5O6S | 10MG
DBCO-NHCO-PEG2-Biotin is a PEG-based click chemistry linker with a dibenzocyclooctyne (DBCO) reactive group and a PEG2 spacer, designed for copper-free strain-promoted alkyne-azide cycloaddition (SPAAC). It is intended for bioconjugation, labeling, affinity capture, and linker assembly in chemical biology and PROTAC research.
- Enables copper-free SPAAC with azide-functionalized partners.
- Provides biotin affinity for streptavidin/avidin capture.
- Contains a PEG2 spacer for flexibility and improved solubility.
- High purity suitable for conjugation and analytical workflows.
- Available in small research-scale quantities for laboratory use.
eMolecules 882847-34-9 | Fmoc-NH-PEG6-CH2CH2COOH | ChemScene | MFCD06656474 | 575.655 | C30H41NO10 | 96.000 | OC(=O)CCOCCOCCOCCOCCOCCOCCNC(=O)OCC1c2ccccc2-c2ccccc12 | 1g | 572245291
Fmoc-NH-PEG6-CH2CH2COOH | ChemScene | 882847-34-9 | MFCD06656474 | 575.655 | C30H41NO10 | 96.000 | OC(=O)CCOCCOCCOCCOCCOCCOCCNC(=O)OCC1c2ccccc2-c2ccccc12 | 1g | 572245291
Medchemexpress LLC Biotin-PEG2-C6-azide 100mg | 1011268-29-3 | 513.65 g/mol | C22H39N7O5S | 100 MG
Biotin-PEG2-C6-azide is a biotinylated polyethylene glycol linker bearing a terminal azide functional group used for bioconjugation, click chemistry, and PROTAC linker synthesis.
- Provides a terminal azide for copper-catalyzed azide-alkyne cycloaddition.
- Contains a PEG2 spacer to improve solubility and reduce steric hindrance.
- Biotin tag enables streptavidin-based capture and detection workflows.
- Molecular formula C22H39N7O5S; molecular weight ~513.65 g/mol.
- CAS number 1011268-29-3.
- Purity typically ≥98%; appearance white solid; store at -20 °C.
- Available in small-scale research quantities (e.g., 2 mg, 10 mg, 100 mg), packaging varies by supplier.
Medchemexpress LLC Tos-PEG3-CH2COOH | 1581248-63-6 | 98.0% | 362.4 g·mol⁻¹ | C15H22O8S | 5 MG
Tos-PEG3-CH2COOH is a polyethylene glycol (PEG)-based linker bearing a tosylated PEG3 spacer and a terminal carboxylic acid group. It is intended for use in medicinal chemistry workflows as a spacer/conjugation handle during the synthesis of proteolysis-targeting chimeras (PROTACs). Consult the manufacturer's certificate of analysis for batch-specific handling and storage instructions.
- Tosylated PEG3 spacer terminating in a carboxylic acid
- Designed for use as a PROTAC linker and conjugation handle
- Molecular weight 362.4 g·mol⁻¹; formula C15H22O8S
- Available in small research pack sizes suitable for synthesis screening
- Reported purity approximately 98% (supplier listing)
- Store under conditions specified in the certificate of analysis
Sigma Aldrich Fine Chemicals Biosciences Lysostaphin from Staphylococcus simulans recombinant, expressed in E. coli, lyophilized powder | 9011-93-2 | MFCD00131556 | 5MG
Lysostaphin from Staphylococcus simulans recombinant, expressed in E. coli, lyophilized powder | Purity: >=90% (HPLC) | 9011-93-2 | MFCD00131556 | 5MG
AVIDITY LLC POSITIVE CONTROL PROTEIN SUBST
The BIS-300 Kit contains a fully biotinylated MBP-AviTag™ fusion protein standard and an unbiotinylated MBP-AviTag™ fusion protein that may be used as an extent-of-biotinylation comparison for BirA biotin-protein ligase reactions, for SDS-PAGE gel analysis or in Western blot analysis. Kit supplied with the following: One (1) vial containing 50µL of fully biotinylated MBP-AviTag™ fusion protein at 1mg/mL (50µg). One (1) vial containing 100µL of unbiotinylated MBP-AviTag™ fusion protein at 1mg/mL (100µg).
Worthington Biochemical Corporation TPCK TREAT. TRYPSIN 500MG
A chromatographically purified, diafiltered, lyophilized powder that has been treated with L-(tosylamido-2-phenyl) ethyl chloromethyl ketone (TPCK) to inhibit contaminating chymotryptic activity [Kostka and Carpenter, J. Biol. Chem. 239, 1799 (1964)].
Avanti Polar Lipids DSPE-PEG(2000)MALEIMIDE 50MG
DSPE-PEG(2000)Maleimide, Molecular Weight: 2941.64, Molecular Formula: C 139 H 271 N4O 57 P, Powder form, White Color, Not Flammable, 50mg
Avanti Polar Lipids DSPE-PEG 2000 MALEIMIDE, Powder, White, 10 mg
DSPE-PEG(2000) Maleimide is a highly purified, functionalized polyethylene glycol (PEG) lipid designed for advanced research applications in targeted drug delivery. This lipid enables precise conjugation of bioactive molecules to nanoparticle systems, ensuring reliable results in therapies for genetic disorders, cancer, and neurological conditions. Its exceptional purity is confirmed through HNMR analysis, making it a preferred choice for researchers focused on enhancing the specificity and efficacy of drug delivery systems.
- Highly purified PEG lipid for advanced drug delivery
- Facilitates conjugation with thiol-containing bioactive molecules
- Verified structural integrity with no detectable maleimide ring opening
- Application in targeted therapies for genetic disorders and cancer
- Stored at -20°C and shipped with dry ice for optimal stability
- Purity greater than 99% verified by TLC