SiR-PEG2-Biotin Size:1mg 96 SMILES CC1=C(SC=N1)C1=CC=C(CNC(=O)[C@@H]2C[C@@H](O)CN2C(=O)[C@@H](NC(=O)COCCOCCOCCOCCOCCOCCOCC(O)=O)C(C)(C)C)C=C1 Purity (HPLC)

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

and excellent quantum yields

Texes Red PEG3 azide (Sulforhodamine 101 PEG3 azide) is an excellent alkyne-reactive fluorescent reagent for labeling alkyne-containing biological molecules through click chemistry

6 Purity (HPLC) >= 95% Solubility DMSO

729 Purity (HPLC) >= 95% Solubility DMSO

SiR-PEG2-Biotin Size:1mg 96 SMILES CC1=C(SC=N1)C1=CC=C(CNC(=O)[C@@H]2C[C@@H](O)CN2C(=O)[C@@H](NC(=O)COCCOCCOCCOCCOCCOCCOCC(O)=O)C(C)(C)C)C=C1 Purity (HPLC)SiR PEG2 Biotin is a fluorescent tracer used in biological research that combines the far red fluorophore with biotin. Biotin is a high affinity ligand for streptavidin and avidin proteins. PEG2 linker enhances water solubility and provides spatial separation to minimize steric hindrance during binding interactions. SiR (SiR 6 COOH, 652Ex 674Em) is a far red fluorescent dye that is bright, photostable, and cell permeable, and it is fully compatible