FASTA format check for AAs

Hi all!

I set up a SequenceServer to perform BLAST on multiple proteomes.

I don’t know if it’s a bug or is it as intended, but while testing it, if I paste a protein with non AAs characters (i.e. B,O,J,U,Z) the programs doesn’t output an error.

Is there a part of the code where I can implement this?

Thanks!