| Summary: | 碩士 === 國立東華大學 === 資訊工程學系 === 92 ===
DNA Sequencing is now a well versed technology. Many species's DNA sequences have been sequenced and preceded. Databases for complete genomes become huge and huge. For example, the size of each complete bacterial genome sequence is from 100 thousand to 9 million base pairs (bps). Therefore, to find a way to represent a species is an important research.
In this thesis we explore the complete sequences in 143 sequenced bacterial genomes and 100 SARS sequences, which are downloaded from National Center for Biotechnology Information, NCBI for short, on 2003/11/13. We analyze these sequences and obtain the following results. First, we find the unique sequences for each of these bacteria and SARS viruses. Then, we propose a phylogenetic relationship on SARS viruses based on their unique sequences. Finally, we propose an approach to find a best signature for bacteria.
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