There’s more to DNA than just the double helix we know and love: under some conditions this familiar molecule can take on unfamiliar forms, each of which can have a different impact on our health.

Hosted by: Hank Green

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Sources:
General overviews of alternate DNA structures:
https://www.intechopen.com/books/dna-...
https://www.ncbi.nlm.nih.gov/books/NB...
http://people.bu.edu/mfk/restricted56...

B-DNA and history of the double helix:
https://www.nature.com/scitable/topic...

A-DNA:
https://journals.iucr.org/q/issues/19...

Z-DNA:
https://www.nature.com/articles/s4200...

H-DNA:
https://www.pnas.org/content/pnas/101...

G-quadruplexes:
https://www.ncbi.nlm.nih.gov/pmc/arti...

Image Sources:
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
https://www.istockphoto.com/vector/dn...
https://www.istockphoto.com/photo/chr...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
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https://www.istockphoto.com/photo/abs...
https://commons.wikimedia.org/wiki/Fi...
https://www.istockphoto.com/photo/the...
https://www.istockphoto.com/photo/ill...
https://www.istockphoto.com/photo/yel...
https://www.istockphoto.com/photo/tel...
https://www.istockphoto.com/photo/chr...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...