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Environmental gene tags (EGTs)

Environmental gene tags (EGTs) are short DNA sequences used to characterize and distinguish microbial environments.  EGT include fragments or complete sequences of genes that are important to survive in specific environmental condition and hence are present in the genomes of many microbes of one environment and less or even non-present in another environment.  The frequency of all EGT sequences in the whole genomic content of a specific environment is used as a fingerprint that characterizes the environmental adaptation of microbes. 

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