Histone proteins are rich in

Alanine and glycine

Arginine and lysine

Histidine and serine

Tyrosine and cysteine

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Text solutionVerified

In eukaryotic cell, the DNA is wound around an octamer of histone core to form bead like structures called nucleosomes. The octamer core of histone proteins is made up of two units each of

H_{2} A

H_{2} B

H_{3}

and

H_{4}

. Another histone protein

H_{1}

, is present at the point of entry and exit of DNA from nucleosome. The histone proteins are rich in basic amino acids lysine and arginine which gives a positive charge to them. The positive charge of histone proteins helps in winding of negatively charged DNA around them.
Thus, the correct answer is option B.

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