📖 what
What are histones?
Human BiologyCell Biology
Quick Answer
Histones are proteins that DNA wraps around to form chromatin. They help pack DNA tightly and regulate gene activity.
The Full Story
Histones are positively charged proteins that act like spools for DNA in the nucleus. About 147 DNA base pairs wrap around a histone octamer to form a nucleosome, the basic unit of chromatin. This packaging lets the very long human genome fit inside each cell nucleus and also helps control which genes are accessible for transcription. Chemical changes to histones can loosen or tighten DNA packing.
Key Facts
1.About 147 base pairs of DNA wrap around a nucleosome
2.Nucleosomes are the basic unit of chromatin
3.Histone changes help regulate gene expression
YouTube Angle
Suggested video title for this topic:
"The protein spools that organize your DNA"