Biotin-X-NHS

N-Hydroxysuccinimide (NHS) activates carboxylic acid groups (on biotin) to facilitate coupling reactions. Biotin-X-NHS is a compound used to attach biotin to primary amines under alkaline conditions (pH~8-9). For example, lysines on the surface of proteins, including antibodies, are ideal targets for biotinylation with this compound. Biotin-X-NHS is like Biotin-NHS (Cay-13315), but contains a six-atom spacer arm to minimize steric effects.Formal Name: 6-[[5-[(3aS,4S,6aR)-hexhydro-2-oxo-1H-thieno[3,4-d]imidazol-4-yl]-1-oxopentyl]amino]-2,5-dioxo-hexanoic acid, 1-pyrrolidinyl ester. CAS Number: 72040-63-2. Molecular Formula: C20H30N4O6S. Formula Weight: 454.5. Purity: >95%. Formulation: (Request formulation change), A crystalline solid. Solubility: DMF: 20 mg/ml, DMSO: 20 mg/ml, DMSO:PBS (pH 7.2) (1:1): 0.5 mg/ml. SMILES: O=C(CCCCC1SCC2NC(=O)NC12)NCCCCCC(=O)ON1C(=O)CCC1=O. InChi Code: InChI=1S/C20H30N4O6S/c25-15(7-4-3-6-14-19-13(12-31-14)22-20(29)23-19)21-11-5-1-2-8-18(28)30-24-16(26)9-10-17(24)27/h13-14,19H,1-12H2,(H,21,25)(H2,22,23,29). InChi Key: UVGHPGOONBRLCX-UHFFFAOYSA-N.