John, I've got this in a pull request over on GitHub now. https://github.com/HUPO-PSI/psi-mod-CV/pull/8/commits/c8e93731d382e173db311856755357848b3c7666 Didn't know that RESID was still going. Happy to integrate those new RESID terms into PSI-MOD.
Hi Val, (crossposting this to both sites) This isn't currently in the PSI-MOD CV, but certainly should be! It would be similar to MOD:01970, but with a glutaminyl in place of the glutamyl. I'll create the pull request over on github to add this modification. Paul
Succinyl Lysine derivatization