Which component is NOT found in the histone octamer, the core protein structure of a nucleosome?

✅Explanation:
-The histone octamer, the central unit of a nucleosome, consists of eight core histone proteins: two each of H2A, H2B, H3, and H4. These proteins wrap and compact DNA, enabling its efficient storage and accessibility within the nucleus. However, H1 (H1) is a linker histone that binds to the DNA entering and exiting the nucleosome, contributing to higher-order chromatin organization but not part of the core octamer itself.

🔴 Related Terminology:
-Nucleosome: The building block of chromatin, consisting of DNA wrapped around a histone octamer.
-Histones: Specialized proteins responsible for packaging and organizing DNA in eukaryotic cells.
-Linker histone: H1 binds to DNA entering and exiting the nucleosome, affecting chromatin compaction.
-Chromatin: The complex of DNA and proteins (including histones) that forms chromosomes in eukaryotic cells.