Protein Modification Reagents
![eMolecules 721431-18-1 | 3-Amino(peg4)propionic acid biotinamide | Combi-Blocks | MFCD08457831 | 491.600 | C21H37N3O8S | 98.000 | OC(=O)CCOCCOCCOCCOCCNC(=O)CCCC[C@@H]1SC[C@@H]2NC(=O)N[C@H]12 | 1g | 335350416](https://assets.fishersci.com/TFS-Assets/CCG/product-images/NC1767738.jpg-250.jpg)
eMolecules 721431-18-1 | 3-Amino(peg4)propionic acid biotinamide | Combi-Blocks | MFCD08457831 | 491.600 | C21H37N3O8S | 98.000 | OC(=O)CCOCCOCCOCCOCCNC(=O)CCCC[C@@H]1SC[C@@H]2NC(=O)N[C@H]12 | 1g | 335350416
3-Amino(peg4)propionic acid biotinamide | Combi-Blocks | 721431-18-1 | MFCD08457831 | 491.600 | C21H37N3O8S | 98.000 | OC(=O)CCOCCOCCOCCOCCNC(=O)CCCC[C@@H]1SC[C@@H]2NC(=O)N[C@H]12 | 1g | 335350416
Kyfora Bio DSPE 250 MG
DSPE (1,2-Distearoyl-rac-glycero-3-Phosphatidylethanolamine) is a saturated zwitterionic phospholipid and a derivative of phosphatidylethanolamine. It can be used in liposomal drug and gene delivery formulations. DSPE can be conjugated with PEG or PCB to develop stealth liposomes that have extended circulation time in the bloodstream.Key application(s): LNP, stealth liposomes
Kyfora Bio DSPE 25 MG
DSPE (1,2-Distearoyl-rac-glycero-3-Phosphatidylethanolamine) is a saturated zwitterionic phospholipid and a derivative of phosphatidylethanolamine. It can be used in liposomal drug and gene delivery formulations. DSPE can be conjugated with PEG or PCB to develop stealth liposomes that have extended circulation time in the bloodstream.Key application(s): LNP, stealth liposomes
Medchemexpress LLC DSPE-PEG-maleimide | 00-00-0 | 99.5% | 10MG
DSPE-PEG-maleimide (MW 5000) is a pegylated phospholipid that combines a DSPE lipid anchor with a PEG spacer terminated in a maleimide group for selective thiol conjugation. Supplied as a solid powder with high purity, it is designed for incorporation into liposomes and lipid nanoparticles and for attaching thiol-containing ligands and peptides to particle surfaces.
- Molecular weight ~5,000 for predictable spacer length.
- Maleimide functional group enables selective thiol conjugation.
- DSPE lipid anchor allows stable insertion into lipid bilayers.
- PEG spacer increases circulation time and stability of formulations.
- High purity (~99.5%) suitable for research and formulation work.
- Powder form with recommended storage at -20°C for long-term stability.
Chemscene ChemScene | N3-PEG4-C2-Pfp ester | 250MG | CS-0105087 | 0.97 | 1353012-00-6| MFCD20926373 | 457.35
ChemScene | N3-PEG4-C2-Pfp ester | 250MG | CS-0105087 | 0.97 | 1353012-00-6| MFCD20926373 | 457.35
Medchemexpress LLC Fluorescein-PEG4-acid | 1807518-76-8 | MFCD23726637 | 95.0% | 654.68 g/mol | C32H34N2O11S | 5 MG
Fluorescein-PEG4-acid is a PEG-based linker that incorporates a fluorescein dye and terminates in a free carboxylic acid. It is intended for use as a linker in PROTAC synthesis and for covalent conjugation to biomolecules to provide fluorescent labeling for assays and imaging.
- PEG4 spacer with a fluorescein dye for fluorescence tagging.
- Terminal carboxylic acid enables amide coupling to amines.
- Suitable as a PROTAC linker and for fluorescent labeling applications.
- Yellow to orange solid; molecular weight 654.68 g/mol.
- Store under nitrogen, away from moisture; in solvent: -80°C (up to 6 months), -20°C (up to 1 month).
Chemscene ChemScene | Biotin-PEG1-NH2 | 250MG | CS-0147801 | 0.97 | 811442-85-0| MFCD28397128 | 330.45
ChemScene | Biotin-PEG1-NH2 | 250MG | CS-0147801 | 0.97 | 811442-85-0| MFCD28397128 | 330.45
Medchemexpress LLC Dota-peg5-c6-dbco | 00-00-0 | 96.3% | C49H71N7O14 | 10MG
DOTA-PEG5-C6-DBCO is a heterobifunctional PEG-based linker that combines a DOTA chelator with a DBCO moiety for copper-free strain-promoted alkyne-azide cycloaddition (SPAAC). Supplied as a high-purity solid, it is designed for bioconjugation, PROTAC linker synthesis, and preparation of radiometal-labeled conjugates where chelation and bioorthogonal coupling are required.
- Heterobifunctional linker with DOTA chelator and DBCO reactive group.
- Enables copper-free SPAAC click conjugation to azide-functionalized molecules.
- Suitable for radiometal chelation and preparation of labeled conjugates.
- High purity (96.3%).
- Solid powder format with recommended storage at -20°C.
- Available in small batch sizes (5 mg-200 mg, larger quantities by quote).
Medchemexpress LLC Mal-PEG2-oxyamine TFA | 00-00-0 | MFCD00209801 | 96.5% | C12H17F3N2O7 | 10MG
Mal-PEG2-oxyamine TFA is a PEG-based bifunctional linker supplied as the trifluoroacetic acid (TFA) salt for use in PROTAC synthesis and other bioconjugation applications. It combines a maleimide reactive group with an oxyamine functional handle, and a short PEG2 spacer to enhance solubility and flexibility.
- Bifunctional linker enabling thiol and carbonyl conjugation.
- Maleimide permits rapid, thiol-selective coupling under mild conditions.
- Oxyamine enables chemoselective oxime ligation to aldehydes and ketones.
- PEG2 spacer increases aqueous solubility and reduces steric hindrance.
- Provided as TFA salt to improve stability and handling.
- High purity suitable for research and synthetic workflows.
Sigma Aldrich Fine Chemicals Biosciences HRV 3C Protease. N Termina1MG
HRV-3C protease from human rhinovirus type 14 is a protease that specifically cleaves within an eight-residue recognition sequence.Proteolytic cleavage occurs between the Gln and Gly residues.HRV-3C protease is a useful tool to cleave recombinant proteins that are expressed as a fusion protein with this sequence between the carrier domain and the protein of interest.This recombinant version contains a six-histidine tag and can be easily removed by IMAC chromatography.
