DBCO-Dap(m-PEG4)-Val-Cit-PAB(m-PEG8)-PNP Size:50mg 495 SMILES: NCCCCC(NC(=O)C1=CC=C2C(=C1)C(=O)OC21C2=CC=C(O)C=C2OC2=C1C=CC(O)=C2)C(O)=O Purity (HPLC):

495 SMILES: NCCCCC(NC(=O)C1=CC=C2C(=C1)C(=O)OC21C2=CC=C(O)C=C2OC2=C1C=CC(O)=C2)C(O)=O Purity (HPLC): ≥ 95% Shipping Conditions: room temperature Storage Conditions: Refrigerated Regulatory Statement: For Research Use Only

472 Purity (HPLC) >= 95% Solubility DMSO

while the BG moiety forms a stable thioether bond with SNAP-tag’s engineered alkyltransferase cysteine

364 SMILES OC(=O)CCOCCNC1=CC=C2C(=O)N(C3CCC(=O)NC3=O)C(=O)C2=C1 Purity (HPLC) >= 95% Shipping Conditions Room temperature Storage Conditions Refrigerated Shelf Life 12 months after the date of delivery Regulatory Statement For Research Use Only

DBCO-Dap(m-PEG4)-Val-Cit-PAB(m-PEG8)-PNP Size:50mg 495 SMILES: NCCCCC(NC(=O)C1=CC=C2C(=C1)C(=O)OC21C2=CC=C(O)C=C2OC2=C1C=CC(O)=C2)C(O)=O Purity (HPLC):SOLU KNEX cleavable linker features a Val Cit dipeptide. In this product, a DBCO Dap(m PEG4) moiety replaces the conventional maleimidocaproyl (MC) unit to enhance aqueous solubility. DBCO is a strained alkyne commonly used in copper free click chemistry, specifically in the strain promoted azide alkyne cycloaddition (SPAAC) reaction. Additionally, m PEG8 is attached to the commonly used self immolative para aminobenzyl (PAB) moiety to further