The Geptop 2.0 web server provides an online platform tool to detect essential genes set across bacterial species using http://guolab.whu.edu.cn/geptop/. The nitrogen metabolism gene nucleotides (assimilatory nitrate reductase, respiratory nitrate reductase, nitrite reductase, nitric oxide reductase, hydroxylamine reductase, and glutamine synthetase) of bacteria Lelliottia amnigena were submitted in FASTA format. The web server computed the essentiality score of each gene by comparing Orthology and Phylogeny information (DEG database). The default essentiality cut-off was set at 0.24.
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