How do I add an intermolecular (interchain) bond Feature to a protein sequence?
SnapGene allows the addition of interchain bond Features to a protein sequence. Bond types can be disulfide, thioether, thiolester, x-link or other. In this lesson we show how to add an interchain disulfide bond.
Open a Protein Sequence
Open a protein sequence.
Click and drag to select the cysteine residue involved in the interchain disulfide bond.
Add a Bond Feature
Click Features → Add Feature.
Enter a name for the Feature, set the Type: to "Bond", set the Subtype: to "disulfide (interchain)".
Optional: Add information to the /note qualifier.
Click OK to add the bond.
View the Bond Feature
The bond Feature displays in Map view and Sequence view as a vertical line.
In Sequence view, double click on the bond line if you want to edit the bond Feature.