Chromatin Compaction Levels
DNA → nucleosome → 30nm fibre → loops → metaphase chromosome.
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flowchart LR
DNA[Naked DNA double helix\n~2 nm] --> Nuc[Nucleosome\n'beads on a string'\n11 nm]
Nuc --> Fib[30 nm fibre\nsolenoid / zig-zag]
Fib --> Loop[Looped domains\n~300 nm]
Loop --> Cond[Condensed chromatid\n~700 nm]
Cond --> Meta[Metaphase chromosome\n~1400 nm]
classDef stage fill:#dbeafe,stroke:#1e3a8a;
class DNA,Nuc,Fib,Loop,Cond,Meta stage