I've been giving this some thought, and I think store-like commands that modify DNA instead of memory locations would be really cool.
Basically, it'd be something like:
<type, value, DNAlocation> DNAstore to overwrite a DNA type at DNAlocation.
<length, DNAlocation> DNAInsert to insert a run of blanks.
<length, DNAlocation> DNADelete to delete a run of DNA.