When I used qiime dada2 denoise-single (DADA2) to obtain the 'rep-seqs.qza' file， I found that each represent sequences in "Feature Detail" is identified by a unique ASCII code.
I used the same database to analyze different data, will the ASCII identity will be changed? I also made some attempts and found that ASCII code didn't change, so I want to
confirm whether the ASCII code will change or not ?
The second question just like the first one, will this ASCII change when I use a different database? Such as comparing the same data to SILVA138 and Greengenes databases.