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Table 1 The content of the primary data set before and after removing human DNA fragments

From: Environmental metagenome classification for constructing a microbiome fingerprint

ID

Country

City

#samples

Average #reads per sample

    

Original data

Without human DNA

SCL

Chile

Santiago

20

14,895,560

10,281,642

TOK

Japan

Tokyo

20

28,234,328

12,172,488

AKL

New Zealand

Auckland

15

4,929,497

4,849,711

HAM

New Zealand

Hamilton

16

6,073,774

5,999,711

OFA

Nigeria

Offa

20

35,469,676

34,936,176

PXO

Portugal

Porto

60

5,100,568

3,406,160

NYC

USA

New York

126

8,437,471

7,059,544

SAC

USA

Sacramento

34

25,153,713

22,627,578

Together

311

12,757,221

10,224,299