Mal-Propionyl-PEG2-Gly-Gly-Phe-Gly-PAB(m-PEG4)-PNP Size:10mg NCC#CC1=CC=C2C(=O)N(C3CCC(=O)NC3=O)C(=O)C2=C1 Purity (HPLC) >= 95%

NCC#CC1=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

338 SMILES OC(=O)CCC(=O)NC1=C2CN(C3CCC(=O)NC3=O)C(=O)C2=CC=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

937 Purity (HPLC) >= 95% Solubility DMSO

BG-Vbn (Vinylbenzoyl-Halo) is a SNAP-tag substrate containing an alkene group

Mal-Propionyl-PEG2-Gly-Gly-Phe-Gly-PAB(m-PEG4)-PNP Size:10mg NCC#CC1=CC=C2C(=O)N(C3CCC(=O)NC3=O)C(=O)C2=C1 Purity (HPLC) >= 95%SOLU KNEX cleavable linker features a Gly Gly Phe Gly (GGFG) peptide. The conventional maleimidocaproyl (MC) unit is replaced by Mal Propionyl PEG2 moiety to enhance aqueous solubility. The Mal Propionyl group may also improve retro Michael addition stability during antibody conjugation. m PEG4 is attached to the commonly used self immolative para aminobenzyl (PAB) moiety to increase aqueous solubility. The PNP (para nitrophenyl) moiety serves as an