(To the tune of “Twinkle, Twinke Little Star”) / Recording by David Simmons
Lysine, arginine and his
Basic ones you should not miss
Ala, leu, val, ile, and met
Fill the aliphatic set
Proline bends and cys has ‘s’
Glycine’s ‘R’ is the small-EST
Then there’s trp and tyr and phe
Structured aromatically
Asp and glu’s side chains of R
Say to protons “au revoir”
Glutamine, asparagine
Bear carboxamide amines
Threonine and tiny ser
Have hydroxyl groups to share
These twen-TY amino A’s
Can combine a zillion ways
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