The Parker track uses the method of Parker et al., 1986, which is a hydrophilicity scale based on high-performance liquid chromatography retention times of model synthetic peptides. Hydrophilicity measures have been used extensively in the prediction of antigenic amino acid residues. The Parker method uses a modified Hopp-Woods algorithm together with a new set of hydrophilicity options.

To apply this track to the sequence:

In the Tracks panel, expand Hydropathy and check the box next to Parker. The track will now be visible in the Sequences view.

To edit track options:

Select the track in the Tracks panel. Open the Track Options section, which appears as follows:

  • Residues to average – number of residues to be averaged when constructing each point in the plot. The default is 9.

Click if you wish to return to the default value.

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