Which of the following is a basic amino acid?
Serine
Alanine
Tyrosine
Lysine
The structure of Lysine is H2N−CH2−CH2−CH2−CH2−CH(NH2)−COOHH_2N-CH_2-CH_2-CH_2-CH_2-CH(NH_2)-COOHH2N−CH2−CH2−CH2−CH2−CH(NH2)−COOH. Lysine is a basic amino acid.
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