Discovery of the genetic code
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
Cell extract
Incubate
reaction
Phe
Phe
Phe
Phe
Phe
Phe
Cell debris
CACACACACACACACACACA
CCCCCCCCCCCCCCCCCC
Pro-Pro-Pro-Pro-Pro
His-Thr-His-Thr-His-Thr