Mal-Cyclohexyl-PEG3-Biotin is a PEG linker containing a maleimide moiety and a biotin group. Maleimides react specifically with sulfhydryl groups to form a stable thioether linkage when the pH is between 6.5 and 7.5. The biotinylation can react with amine molecules in the presence of activator EDC or HATU. PEG attached to the biotin gives an extended spacer arm that permits the biotin to reach into the binding pocket of the protein. The PEG moiety also increases solubility of Biotin-PEG conjugates considerably.
MedKoo Cat#: 122074
Name: Mal-Cyclohexyl-PEG3-Biotin
CAS#: 2639395-45-0
Chemical Formula: C30H47N5O8S
Exact Mass: 637.3145
Molecular Weight: 637.79
Elemental Analysis: C, 56.50; H, 7.43; N, 10.98; O, 20.07; S, 5.03
The following data is based on the product molecular weight 637.79 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.
| Concentration / Solvent Volume / Mass | 1 mg | 5 mg | 10 mg |
|---|---|---|---|
| 1 mM | 1.15 mL | 5.76 mL | 11.51 mL |
| 5 mM | 0.23 mL | 1.15 mL | 2.3 mL |
| 10 mM | 0.12 mL | 0.58 mL | 1.15 mL |
| 50 mM | 0.02 mL | 0.12 mL | 0.23 mL |
