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http://www.cimr.cam.ac.uk/links/codon.htm<br />

Substitution matrices for aa<br />

Amino acids are not equal:<br />

1. Some are easily<br />

substituted, similar:<br />

• biochemical properties<br />

• structure<br />

2. Some mutations occur<br />

more often due to similar<br />

codons<br />

The two above give us<br />

substitution matrices<br />

http://www.people.virginia.edu/~rjh9u/aminacid.html<br />

orange: nonpolar and hydrophobic.<br />

green: polar and hydrophilic<br />

magenta box are acidic<br />

light blue box are basic

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