Protein Modification Reagents
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Medchemexpress LLC DSPE-PEG 2000 | 892144-24-0 | 99.37% | (C2H4O)nC42H82NO10P | 25 MG
DSPE-PEG 2000 is a PEG polymer containing DSPE and amine end groups. It can be used to form micelles as nanoparticles for drug delivery.
- Powder: -20°C for 3 years.
- In solvent: -80°C for 6 months, -20°C for 1 month.
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Medchemexpress LLC Biotin-PEG4-PFP ester | 1334172-58-5 | MFCD13184979 | 96.2% | 657.65 | C27H36F5N3O8S | 50 MG
Biotin-PEG4-PFP ester is an activated biotin linker containing a four-unit polyethylene glycol (PEG4) spacer and a pentafluorophenyl (PFP) ester leaving group. It is designed for efficient amine coupling and biotin tagging in bioconjugation workflows such as ADC and PROTAC synthesis.
- Cleavable PEG4 spacer provides flexibility and solubility
- PFP activated ester enables rapid coupling to primary amines
- Biotin tag allows affinity capture and detection
- Suitable for antibody-drug conjugate and probe labeling workflows
- Stable as a powder at -20°C for extended storage
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Medchemexpress LLC Nhpi-peg4-c2-nhs ester | 1415328-95-8 | MFCD28155511 | 98.9% | 508.48 g/mol | C23H28N2O11 | 1 G
NHPI-PEG4-C2-NHS ester is a PEG-based ADC linker used in the synthesis of antibody-drug conjugates (ADCs). It is supplied for research use and has a molecular weight of 508.48 g/mol and formula C23H28N2O11. Store the pure material at -20°C; observe low-temperature storage for solutions.