Select by Accession Number
If you have the NCBI
RefSeq accession number, either NM or XM, enter it in the space
provided and click "Search". Since many of the known genes have
numerous and redundant overlapping cDNA sequences in the public
domain, and each has been assigned a different accession number,
imposing the need to search only with NM and XM numbers avoids missing
a match with an inappropriate accession number entered by the end-user.
The NM/XM accession number can be obtained easily at NCBIs
Web site by entering the accession number with which you are
familiar and asking for a return of Related Sequences. It should
be noted, however, that about 10 percent of our reference sequences
have not yet been accorded a RefSeq NM/XM number and this type of
search would miss them.
For reference sequences without an NM/XM accession number, you
may be able to locate them using the Genbank accession number
- two letters followed by six digits (e.g., AF123456).