4.5 Summary of Section 4
Proteins that serve similar functions often have similar amino acid sequences. The sequence of a protein can point to a particular function and can also be used to predict protein conformation.
Homologous proteins contain statistically significant (i.e. above random) similarities in their amino acid sequences.
The SH2 domain is an example of a domain that is highly conserved across different eukaryotes and is common to many different proteins.