Especially since E coli for isntance uses multiple stop codons fo different types as some work better than others. Pass on this one. This is complicated still further by the fact that some organisms use slightly different genetic codes and a temination codon in one organism is an amino acid in another. I think we should in this case think a bit about the way evoultion went. The reason may be that you need a specific tRNA for initiation and need not for termination.
Initiation is more complicated and more constrained.
Gustavo wouldn't recommend using the GNA-Lab right now. Material seems to be introductory. The housekeeper arrives to cart henryb off to bed. The housekeeper arrives to cart Hagar off to bed. I cannot get access to the archives of discussion list.