<sequence type="unambiguous_DNA">
<seq>acggatattatcgcggcatcgat...ctatgcgatcatcg</seq>
<name>Regulatory gene ...</name>
<gcContent>0.57</gcContent>
</sequence>
oligonucleotides -> GC content -> melting temperature -> palindromes -> repeats -> ... These analysis could both be used in separate programs for simlar but slightly different tasks such as designing PCR primers and hybridization probes