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Is the ncbi taxon code a number?

hello,

I would like to download sequences using ncbi's esearch -db "nucleotide" -query "txidX[Organism] where X is the code for a given organism. Are these code numbers (integers) or alphanumeric?

Thank you

genome

1 answer

NCBI taxonomy identifiers are all numbers (integers), but you can also query on scientific (or common) names

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