K

Lysine

Lys

BasicEssentialHydrophilicSide-chain pKa 10.5128 Da

Butylammonium (–(CH₂)₄NH₃⁺)

A long, flexible basic residue that is often ubiquitinated or acetylated.
Side-chain pKa ≈ 10.5, so it is protonated (Lys⁺) at physiological pH.

Mastery: unseen

Drill this residue Flashcards

Structure of Lysine — Zoom or rotate if a drawing is too tight — saved on this device