Hello All
I was using these commands for my analysis and I got this graph. What number should I use for --p-trim-left --p-trunc-len ? (qiime tutorial is suggesting 120bp for their example but for my sequence, it looks like a line).
I used V5-V6 as my target and it is around 280bp and with barcode and adaptors 350bp. And the sequencer is Ion Torrent S5.
qiime cutadapt demux-single --i-seqs multiplexed-seqs.qza --m-barcodes-file metadata.tsv --m-barcodes-column Barcode --p-error-rate 0 --o-per-sample-sequences demultiplexed-seqs.qza --o-untrimmed-sequences untrimmed.qza --verbose
4- qiime cutadapt trim-single --i-demultiplexed-sequences demultiplexed-seqs.qza --p-front ATTAGATACCCYGGTAG --p-error-rate 0 --o-trimmed-sequences trimmed-seqs.qza --verbose
5- qiime demux summarize --i-data trimmed-seqs.qza --o-visualization trimmed-seqs.qzv
6- qiime dada2 denoise-pyro --i-demultiplexed-seqs demux.qza --p-trim-left 0 --p-trunc-len 120 --o-representative-sequences rep-seqs-dada2.qza --o-table table-dada2.qza --o-denoising-stats stats-dada2.qza