I have downloaded my FASTA format files, that have the DNA sequences of the coding region of the genes and the DNA sequence of the complete genome, from NCBI. How can I recognize if these sequences have been assembled or not ?
In particular, I read this paper Genome Sequencing of a Genetically Tractable Pyrococcus furiosus Strain Reveals a Highly Dynamic Genome and I downloaded the sequences that they indicate in Nucleotide sequence accession number where they say:
The fully assembled DNA sequence of COM1 has been deposited in GenBank (accession number CP003685).
I clicked on the link CP003685 and I downloaded the DNA sequences that I mentioned at the beginning by clicking on "Send to", then "Complete Record",then "File" (in Choose Destination), then FASTA (in Format). For the cds file I made the same steps but clicking on "Coding Sequences" and I could do the same to have the sequences of the genes clicking on "Gene Features". But are these sequences assembled? By reading the extract of the article I would say yes... but is there a way to know this from the FASTA files that I downloaded or the NCBI website ?
Moreover, why is it important to know how a sequence has been assembled (so which software has been used) ?
I apologize for my very basic questions and I thank you in advance.