SequenceI aseq = af.getViewport().getAlignment().getSequenceAt(0);
SequenceFeature sf = null;
sf = new SequenceFeature("disulphide bond", "", 2, 5, Float.NaN, "");
SequenceI aseq = af.getViewport().getAlignment().getSequenceAt(0);
SequenceFeature sf = null;
sf = new SequenceFeature("disulphide bond", "", 2, 5, Float.NaN, "");