boc-peg4-val-cit-pab-oh

Boc-PEG4-Val-Cit-PAB-OH is an enzyme-cleavable ADC linker that features a Boc-protected amine, a hydrophilic PEG spacer, and a Val-Cit-PAB dipeptide. The benzyl alcohol on PAB is useful for attaching reactive groups (e.g., PNP) to bind with drug payloads. Acidic conditions can remove the Boc protecting group, exposing the primary amine for conjugation reactions to form amides. The Val-Cit-PAB segment can be cleaved by intracellular proteases, allowing efficient payload release within cells.

Fmoc-PEG4-Val-Cit-PAB-OH is an enzyme-cleavable ADC linker that incorporates a Boc-protected amine, a hydrophilic PEG spacer, and a Val-Cit-PAB dipeptide. The benzyl alcohol on PAB can be used to attach reactive groups (such as PNP) for drug payload conjugation. The Fmoc protecting group can be removed with piperidine to expose a primary amine, facilitating amide bond formation. Val-Cit-PAB is cleaved by cellular proteases to efficiently release the payload inside cells.