Biotin-PEG4-Hydrazide is a high-purity biotinylation reagent with a hydrazide group for aldehyde/ketone conjugation, linked through a PEG4 spacer for solubility, flexibility, and reduced steric hindrance.
Polyethylene Glycol PEG Linkers > Biotin PEG > Biotin-PEG-Hydrazide
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