Amino Acid Frequency

This page to generate a frequency distribution of amino acids occuring at a particular numbered position, based on pre-calculated numbering stored in the database:

A bar chart of the residue distribution for the selected residue is displayed together with an associated table containing the residue counts in non-identical sequences and the relative frequencies. You may also download a version of the graph.

Note The organism specification is hierarchical e.g. if you select Rattus the distribution will include sequences from all Rattus species including, for example, Rattus rattus and Rattus fuscipes.