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How does the metagenomics approach help to identify novel genes present in the environment? Explain the process.

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Metagenomics approach has been developed to identify and select microbial genes synthesizing novel molecules. 

This approach utilizes the large number of microbial genomes present in an environmental niche (eg. in soil, in water such as ocean or in human gut). These genomes are contributed by both the culturable and the nonculturable variety of microbes and together constitute metagenome.

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