I've succesfully run Trinotate for functional annotation of a Trinity assembly. One of its output files is the report table 'Trinotate.xls'.
This table has several transcripts without any BLASTX, BLASTP or PFAM annotation. Cells for those transcripts are generally filled with a single dot. I am attaching an excerpt from the table in this post.
My question is: what exactly are such annotationless transcripts? I'm guessing they are just Transdecoder ORFs that found no match against any database, but I'd like to be sure of that before proceeding to downstream analysis.
Thanks!