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  4. Which amino acids are present in histones?

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Q. Which amino acids are present in histones?

Biomolecules

Solution:

Histone contains basic proteins, bristling with positively charged arginine $(Arg)$ and lysine $(Lys)$ residues. Both $Arg$ and $Lys$ have a free amino group on their $R$ group, which attracts protons $\left( H ^{+}\right)$ giving them a positive charge.