From: The action of selection on codon bias in the human genome is related to frequency, complexity, and chronology of amino acids
Amino acid
RMCU vs. maximum expression
RMCU vs. breadth of expression
Ala
+
Asn
N.S.
-
Asp
Cys
Gln
Gly
His
Ile
Leu4
Phe
Pro
Ser2
Ser4
Thr
Tyr
Val