總體基因體分析使用編碼區註釋中的兩種方法來組合基因序列末端標籤[14]。第一個方法是根據在序列數據庫中已公開的同源基因來辨別基因,通常是透過簡單的BLAST搜索。這種搜索方法是MEGAN4程式裡面就有的[15]。第二個,從頭計算,使用序列固有的特點根據從相關物種而來的gene training sets來預測編碼區段。GeneMark和GLIMMER等程式就是採用這種方式[16]。從頭計算的主要優點是它能夠偵測在序列資料庫中缺少同源片段的編碼區。然而,最準確的時候是用連續的基因組DNA的大片段來比較[12]。
作為另一個項目的一部分進行的一項研究,MetaHit(Metagenomics of the Human Intestinal Tract、人體腸道宏基因組學),對124名丹麥人和西班牙人進行了研究,其中包括健康人、肥胖者和腸易激綜合徵患者。 這項研究檢查了胃腸道菌群的系統多樣性。我們正在研究居住在胃腸道的細菌菌群具有什麼樣的系統多樣性。 結果表明,擬桿菌門(Bacteroidetes)和厚壁菌門(Firmicutes)這兩個門是構成腸道菌群90%以上的菌株。
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