DNA is perfect for the storage and readout of genetic information, which is
stored in the way the bases match one another on opposite sides of the double
helix. Adenine (A) pairs with thymine (T), and guanine (G) with cytosine (C),
with each pair forming a set of complementary hydrogen bonds.
The all-atom model (shown here on the second side) has the sequence C-G-C-T-T-A-A-GC-G.
Notice that this sequence is palindromic: if you take one chain and flip it around, it
will form the proper base pairs with another copy of the chain. Add your own base pairs in
the model to the right…but be sure to pair them up properly! The edges of the base pairs
are exposed in the two grooves of the double helix: the wider major groove and the narrower
minor groove. These edges are also used to carry information that is read by proteins that
interact with the double helix.
Cut out the model. Fold all long creases first. Solid
grey lines should be visible on
the crease.
Fold dotted grey lines so they are
hidden in the crease.
Fold the paper in half so that the
backbone (with 3’ written at the
top) pops out.
Tuck the other backbone flaps
(with 5’ at the top) one over the
other, so your model looks like the
on in the picture.
Fold the backbones so the model
is flat. Fold the horizonal and
diagonal lines like a fan (solid
lines should be visible on the
crease, dotted lines on the inside).
Your model should look like this
when all lines have been folded.
Pull the model open, and pop out
the backbones on the sides.
Your finished model is a righthanded
double helix. Use the tabs
to connect several models to
make longer strands.
1 2 3
4 5 6
7 8 9
About
DNA
For
More
Read the Molecule of the Month feature on DNA at
http://dx.doi.org/10.2210/rcsb_pdb/mom_2001_11
Download additional copies of this model from the Educational Resources section of
http://www.rcsb.org/pdb101
www.rcsb.org • info@rcsb.org
Build a Paper Model of DNA
Fill in the names of the bases on the model
shown to the right, or use the detailed
model that shows all the atoms in each
nucleotide (back side of paper).
For a video
demonstration,
visit PDB-101 or
bit.ly/19IlwNH
www.rcsb.org/pdb101