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Its two distinguishing features are: The central proline imposes backbone rigidity through its cyclic side chain The lysine provides a positive charge and the valine a hydrophobic side chain, giving the peptide an amphipathic character There is no coordination chemistry and no redox-active center
Phosphate buffered saline (PBS) (pH 7.4, 10) was obtained from Vivantis (Malaysia)
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B12 helps keep nerves working and improves blood circulation
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