Need a specific sort of string modification. Can someone help?

[John Ladasky]

On Saturday, January 5, 2013 12:35:26 AM UTC-8, Sia wrote:
> I have strings such as:
>
> tA.-2AG.-2AG,-2ag
> 
> .+3ACG.+5CAACG.+3ACG.+3ACG

Just curious, do these strings represent DNA sequences?