Amino Acid Usage in S. cerevisiae
Serine is the most abundant amino acid, encoded by almost 9% of the codons in the sequences, while tryptophan and cysteine are each encoded by just over 1% of the codons.
Table 1 lists the relative frequencies of the 20 amino acids, also displayed in Figure 1:
Table 1: Amino Acid Frequencies Amino Acid Rel.Freq. ______________________________ stop 0.0021 Trp 0.0104 Cys 0.013 Met 0.0208 His 0.0213 Tyr 0.0332 Gln 0.0388 Pro 0.043 Arg 0.0441 Gly 0.0497 Ala 0.0547 Val 0.0558 Asp 0.0577 Thr 0.058 Asn 0.0605 Glu 0.0649 Ile 0.0655 Leu 0.0687 Phe 0.0722 Lys 0.0728 Ser 0.0897
