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