Propargyl-Gly(m-PEG4)-Gly-Gly-Phe-Gly-PAB(m-PEG4)-PNP halotag 732 SMILES OC(=O)CN1CCN(CC(O)=O)CCN(CC(=O)NCCOCCOCCNC(=O)CCN2C(=O)C=CC2=O)CCN(CC(O)=O)CC1 Purity (HPLC)

732 SMILES OC(=O)CN1CCN(CC(O)=O)CCN(CC(=O)NCCOCCOCCNC(=O)CCN2C(=O)C=CC2=O)CCN(CC(O)=O)CC1 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

Product Name Azide-Lys(m-PEG4)-Gly-Gly-Phe-Gly-PAB(m-PEG8) Synonyms CAS Number Related CAS Molecular Formula C56H90N10O20 Molecular Weight 1223

emission maximum = 660 nm

236 SMILES BrCCCCOC1=C2C(=O)N(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

CC1=C(SC=N1)C1=CC=C(CNC(=O)[C@@H]2C[C@@H](O)CN2C(=O)[C@@H](NC(=O)COCCOCCOCCOCCN)C(C)(C)C)C=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

Propargyl-Gly(m-PEG4)-Gly-Gly-Phe-Gly-PAB(m-PEG4)-PNP halotag 732 SMILES OC(=O)CN1CCN(CC(O)=O)CCN(CC(=O)NCCOCCOCCNC(=O)CCN2C(=O)C=CC2=O)CCN(CC(O)=O)CC1 Purity (HPLC)SOLU KNEX cleavable linker features a Gly Gly Phe Gly (GGFG) peptide. In this product, a Propargyl Gly(m PEG4) moiety replaces the conventional maleimidocaproyl (MC) unit to enhance aqueous solubility. The propargyl functional group is widely employed in click chemistry to undergo selective cycloaddition with azides. Additionally, m PEG4 is attached to the commonly used self immolative para aminobenzyl (PAB) moiety to further increase aqueous