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TRUECLONE™ COLLECTION
Select by Accession NumberIf 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).
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