Marked alignments... how?

[Adrian Kornhauser]

Hi! I'm new at this, so I hope it works

I have seen in some articles, multiple sequence alignements that have
a simbol like "*,."  in the positions where the amino acids are
conserved or where all subtitutions are of aminoacids with the same
proprieties. I have looked for this kind of utilities in GCG, but it
seems this program does not have them or only with nucleotides.
Can someone tell me how they are donne?

Adrian Kornhauser