Glossary

Lysine

Lysine (three-letter code Lys, one-letter code K) is a basic amino acid with a primary amine on a four-carbon side chain, positively charged at neutral pH. Lysine increases water solubility and is a common site for attaching labels, lipids or PEG. Each lysine contributes a site for counter-ion pairing in TFA salts.

Source: en.wikipedia.org

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