Bis-Mal-PEG3 (CAS 1008402-47-8)

Bis-Mal-PEG3, also known as Bis-Maleimido Polyethylene Glycol 3, is a chemical compound that belongs to the family of polyethylene glycol derivatives and has gained significant attention in various scientific and biomedical research fields. Bis-Mal-PEG3 is a cross-linking agent widely used in bioconjugation and protein modification studies. The maleimide groups have high reactivity towards sulfhydryl (-SH) groups, which are present in cysteine residues of proteins. This reactivity enables the specific and efficient conjugation of Bis-Mal-PEG3 with proteins or peptides containing cysteine residues. The PEG linker in Bis-Mal-PEG3 provides several important advantages. Firstly, the hydrophilic nature of PEG enhances the water solubility of the compound, making it suitable for biological applications. Secondly, the flexibility and biocompatibility of PEG minimize steric hindrance and reduce non-specific interactions, ensuring successful protein conjugation and preserving protein functionality. The conjugation of Bis-Mal-PEG3 with proteins serves multiple purposes. It can be employed for site-specific labeling, where the maleimide groups selectively react with cysteine residues to introduce reporter molecules, fluorescent dyes, or other tags into proteins. This enables the tracking and visualization of proteins in biological systems. Additionally, Bis-Mal-PEG3 can be used for protein cross-linking, creating covalent bonds between different protein subunits or protein-protein interactions, which can stabilize protein structures or facilitate the study of protein complexes.