7.1Introduction Per cent of residues in protein 10 eur 8 Ala Glu y ser● Figure 7.2 The 6 Lys● Val le● h AS number of codons Pro: Arg● A for each amino acid Pheb does not correlate Met. His● closely with its Tm frequency of use in 4 5 proteins Number of codons 消当Figure 7.2 The number of codons for each amino acid does not correlate closely with its frequency of use in proteins. 7.1 Introduction