Fig. 1From: Tandem amino acid repeats in the green anole (Anolis carolinensis) and other squamates may have a role in increasing genetic variabilitySchematic representation of a polyA repeat. A polyA repeat contains at least five consecutive A residues. The maximum length of residues other than A is five and the maximum proportion of this non-main residue is 30Â %. If the proportion of main residue (A) is 100Â % in a polyA repeat, it is thought to be a perfect repeat. Otherwise it is an imperfect repeatBack to article page