nucleosome

Chromatin's basic unit

A nucleosome is the fundamental unit of DNA packaging in eukaryotic cells, consisting of a segment of DNA wound around a core of eight histone proteins.

These bead-like structures allow the long strands of DNA to be compacted enough to fit inside a cell's nucleus while still permitting access for gene expression and replication.

The string of nucleosomes, sometimes called "beads on a string," represents the first level of chromatin organization.

histone

tail

Rear animal appendage

modification · lysine · arginine · linker

chromatin

fiber

Plant-based digestive aid

solenoid · positioning · spacing · phasing · remodeling · accessibility · higher-order · chromosome · chromatid · centromere

structure

dyad

Two forming one

turns · gyres · conformation

regulation

remodeling

Altering existing structures

disassembly · turnover · exchange · variant · barrier · promoter · enhancer · occupancy · dynamics

epigenetics

mark

Visible impression or sign

code · inheritance · imprinting · silencing · activation · bivalent · poised · repressive · active · combinatorial

Opposites
chromatin structure

nucleosomechromosome

DNA strand carrying genes

Family

nuclear, nucleus, nuclease, nuclide, nucleoplasm, histones, nuclides

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