1. Signaling Pathways
  2. Antibody-drug Conjugate/ADC Related
  3. ADC Linkers

ADC Linkers

Antibody-drug conjugates (ADCs) consist of a desirable monoclonal antibody, an active cytotoxic drug and an appropriate linker. An appropriate linker between the antibody and the cytotoxic drug provides a specific bridge, and thus helps the antibody to selectively deliver the cytotoxic drug to tumor cells and accurately releases the cytotoxic drug at tumor sites. In addition to conjugation, the linkers maintain ADCs’ stability during the preparation and storage stages of the ADCs and during the systemic circulation period.

The ADCs currently undergoing clinical evaluation contain linkers are mostly classified into two categories: cleavable and noncleavable. Cleavable linkers rely on processes inside the cell to liberate the toxin, such as reduction in the cytoplasm, exposure to acidic conditions in the lysosome, or cleavage by specific proteases within the cell. Noncleavable linkers require proteolytic degradation of the antibody portion of the ADC for release of the cytotoxic molecule, which will retain the linker and the amino acid by which it was attached to the antibody.

The selection of linker is target dependent, based on the knowledge of the internalization and degradation of the antibody-target antigen complex, and a preclinical in vitro and in vivo activity comparison of conjugates. Moreover, the choice of a linker is also influenced by which cytotoxin is used, as each molecule has different chemical constraints, and frequently the drug structure lends itself to a specific linker.

ADC Linkers Isoform Specific Products:

  • Cleavable

  • Non-cleavable

ADC Linkers Related Products (699):

Cat. No. Product Name Effect Purity
  • HY-20336
    Mc-Val-Cit-PABC-PNP
    98.80%
    Mc-Val-Cit-PABC-PNP is a cathepsin cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs).
  • HY-D0975
    Sulfo-SMCC sodium
    Sulfo-SMCC sodium is a commonly used hetero-bifunctional, noncleavable ADC crosslinker bearing N-hydroxysuccinimide (NHS) ester and maleimide groups to react with primary amines and sulfhydryl groups, respectively.
  • HY-W019543
    DSS Crosslinker
    ≥98.0%
    DSS Crosslinker is a non-cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs).
  • HY-118759
    DSP Crosslinker
    DSP Crosslinker is a cleavable ADC linker, used in the synthesis of antibody-drug conjugates (ADCs).
  • HY-78738
    MC-Val-Cit-PAB
    99.33%
    MC-Val-Cit-PAB is a cathepsin cleavable ADC linker that is used for making antibody-drug conjugate.
  • HY-I0781
    Boc-Hyp-OH
    Boc-Hyp-OH is a non-cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs). Boc-Hyp-OH is also a alkyl chain-based PROTAC linker that can be used in the synthesis of PROTACs[2]
  • HY-W002886
    N-Boc-cis-4-hydroxy-L-proline
    N-Boc-cis-4-hydroxy-L-proline is a non-cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs). N-Boc-cis-4-hydroxy-L-proline is also a alkyl chain-based PROTAC linker that can be used in the synthesis of PROTACs[2
  • HY-W018154
    H-Glu-OtBu
    H-Glu-OtBu is a non-cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs). H-Glu-OtBu is also a alkyl chain-based PROTAC linker that can be used in the synthesis of PROTACs[2
  • HY-42973
    DBCO-NHS ester
    99.53%
    DBCO-NHS ester is a cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs).
  • HY-78921
    Fmoc-3VVD-OH
    99.61%
    Fmoc-3VVD-OH is a cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs).
  • HY-12362
    Val-cit-PAB-OH
    99.62%
    Val-cit-PAB-OH is a cleavable ADC linker.
  • HY-41189
    Fmoc-Val-Cit-PAB-PNP
    ≥98.0%
    Fmoc-Val-Cit-PAB-PNP is a cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs).
  • HY-100216
    SPDP
    SPDP (SPDP Crosslinker) is a short-chain crosslinker for amine-to-sulfhydryl conjugation via NHS-ester and pyridyldithiol reactive groups that form cleavable (reducible) disulfide bonds with cysteine sulfhydryls. It is a glutathione cleavable ADC linker used for the antibody-drug conjugates (ADCs).
  • HY-78931
    Boc-Dap-NE
    Boc-Dap-NE, a dipeptide, is a cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs).
  • HY-42360
    SMCC
    ≥98.0%
    SMCC is a protein crosslinker. SMCC-conjugated antigen coupled spleen cells to induce antigen-specific immune responses.
  • HY-W008005
    Amino-PEG4-alcohol
    Amino-PEG4-alcohol is a PEG-based PROTAC linker can be used in the synthesis of PROTACs. Amino-PEG4-alcohol is also a non-cleavable 4 unit PEG ADC linker used in the synthesis of antibody-drug conjugates (ADCs).
  • HY-133540
    Maleimide-DOTA
    99.17%
    Maleimide-DOTA is a non-cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs).
  • HY-78961
    6-Maleimidohexanoic acid N-hydroxysuccinimide ester
    99.62%
    6-Maleimidohexanoic acid N-hydroxysuccinimide ester (EMCS) is a heterobifunctional cross-linking reagent. EMCS is used as a unique and useful reagent for preparation of hapten conjugate and enzyme immunoconjugates.
  • HY-W007713
    Fmoc-8-amino-3,6-dioxaoctanoic acid
    99.65%
    Fmoc-8-amino-3,6-dioxaoctanoic acid (Fmoc-NH-PEG2-CH2COOH) is a cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs). Fmoc-8-amino-3,6-dioxaoctanoic acid is also a PEG-based PROTAC linker that can be used in the synthesis of PROTACs.
  • HY-42972
    DBCO-acid
    99.63%
    DBCO-acid is a cleavable ADC linker used in the synthesis of ADC linker DBCO-NHS ester (HY-115524 and HY-115545), and drug-linker conjugates DBCO-PEG-MMAE (HY-111012 and HY-126690).
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