How can I get NT_ or NM_ or NP_ accessions from NCBI (Reference Sequences)?
To retrieve GenBank reference sequences, or RefSeqs, use Bio::DB::RefSeq, not Bio::DB::GenBank or Bio::DB::GenPept when you are retrieving these accession numbers. This is still an area of active development because the data providers have not provided the best interface for us to query. EBI has provided a mirror with their dbfetch system which is accessible through the Bio::DB::RefSeq object however, there are cases where NT_ accession numbers will not be retrievable.
Use Bio::DB::RefSeq not Bio::DB::GenBank or Bio::DB::GenPept when you are retrieving these accessions. This is still an area of active development because the data providers have not provided the best interface for us to query. EBI has provided a mirror with their dbfetch system which is accessible through the Bio::DB::RefSeq object however, there are cases where NT_ accessions will not be retrievable.
