Question

How many types of histones are there?

Answer 1

Histone:

1. Histones are basic proteins that associate with DNA to form the nucleosome that is essential for the packaging of the genomic DNA into compact structures.
2. There are 5 types of histones namely H2A, H2B, H3, H4 and H1 linker histones.
3. Inside a nucleosome, they exist as two dimers of (H2A-H2B) and a complex of (H3₂-H4₂) ultimately forming an octamer.
4. H1 linker histone associates externally with the nucleosome and helps in further compaction of the chromatin structure.