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. 2017 May 24;74(4):923–936. doi: 10.1007/s00248-017-0996-9

Table 3.

Summary of Illumina sequence data for each 18S region

Analysis step V4 region (read 1) V9 region
Raw sequences or pairs 18,269,491 29,400,737
Joined pairs of reads NA 22,864,953
De-multiplexed reads 7,027,716 21,395,270
Clustered reads (OTUs) 6,477,688 (2270) 21,205,088 (8827)
Eukaryotic reads (OTUs) 6,477,688 (2270) 18,794,581 (7195)
Filtered eukaryotic reads (OTUs) 6,464,532 (824) 18,664,054 (1444)
Average sequences per sample 808,066 1,196,152