Representing Biological Data

• Basic sequence data string of letters

• A, C, G, T (DNA)
• A,C,D,E, etc for Amino Acids

• Can be represented in several ways

• Substitute arbitrary numbers for letters

• e.g. A=1, C=2, G=3, T=4
• doesn’t reflect some properties of the bases
• problems dealing with uncertainty
• Theoretical problems (measurement theory)