Bis-Amine PEG

The H₂N-PEGn-CH₂CH₂NH₂ series, exemplified by H₂N-PEG4-CH₂CH₂NH₂, is a homobifunctional diamine PEG derivative engineered for biomolecular assembly. This spacer enables dual conjugation with carbonyl groups (through Schiff base formation) or carboxyl groups (via amide bond formation), providing flexible crosslinking capabilities. Its key advantages include dual-amine reactivity for versatile conjugation, tunable PEG chain length (n), and enhanced solubility for hydrophobic compounds.