Epic Quest Bio The case files
Case No. 97 · have you seen this molecule?

Nucleosome

the spool your DNA is wound on

File sealed

The detectives are still writing this one up. The poster and the facts are below; the film and the interrogation room open soon.

Booking photographs

Nucleosome, front view, against a height chart in nanometers
FRONT
Nucleosome, side view
SIDE · PDB 1KX5

The suspect, from its real atomic coordinates. Drag to turn it. Height chart in nanometers, a line every 2 nm. A cheek cell is about four thousand times wider.

Rap sheet

Answers to
Nucleosome. First booked as a “nu body.”
Height
15 nm, one tail up. The spool alone: 11.
Weight
330 zeptograms
Build
Eight histones (a frog’s, here), with human DNA wound 1.67 times around.
Marks
Floppy tails, which the cell tags with notes on which genes to use.
Habits
Spools your DNA: about six feet per cell, onto 30 million of them.
Associates
Peas and cows. Their histone H4s differ at 2 of 102 spots.
First seen
Under an electron microscope, as beads on a string.
Last seen
A 5 mL tube marked CHEEK in the freezer at HQ.
4,500,000,000,000

of them on a cheek swab, give or take.
Swabs vary a lot. You’ve never seen one.

The poster on the street

The wanted poster for Nucleosome

This is the photocopied wanted poster for Nucleosome, No. 97. They were made for noticeboards around Boston, Cambridge and the rest of the east coast.

Found one? Scan its QR code with your phone. If you're a signed-in player, the sighting goes on your record with +1 XP.

Not a player yet? Join the Epic Quest: the real role-playing game of Molecular Reality, a nanopore lab, with the CEO as gamemaster.