Question: 146. Histones are enriched with –
(1) Lysine & Arginine
(2) Leucine & Lysine
(3) Phenylalanine & Leucine
(4) Phenylalanine & Arginine
Answer: Option (1)
Explanation:
Histones are basic proteins associated with DNA packaging in eukaryotic chromosomes.
They contain a high proportion of the positively charged amino acids lysine and arginine.
These amino acids help histones bind tightly to the negatively charged phosphate groups of DNA, enabling efficient chromatin formation.
Therefore, histones are enriched with lysine and arginine.