Alexis Rohou asked on Twitter

In

@UCSFChimeraX

1.1.1 and #Isolde by

@CrollTristan

is there an easy way to add aa residues to the end of a chain?

https://twitter.com/AlexisRohou/status/1386171500604977152

Elaine says:

There isn't an "add amino acid" yet in ChimeraX, only Chimera.... unless ISOLDE can do it (I don't know).  So maybe it's an ISOLDE question.

ChimeraX itself has building peptides from scratch but not sticking them on to the end of an existing peptide.

Build Structure, Start Structure: peptide
<https://rbvi.ucsf.edu/chimerax/docs/user/tools/buildstructure.html#start>

or command "build start peptide"
<https://rbvi.ucsf.edu/chimerax/docs/user/commands/build.html#start>

Elaine