Hi Peng, The UCSC Genes track is more discriminatory, with only one mapping. Using the UCSC mapping is probably the best way to go.
database=mm9, search position box = NR_002891 UCSC Genes NR_002891 (uc008guv.1) at chr19:12979721-12981475 - NR_002891 RefSeq Genes (refGene) NR_002891 at chr19:12979721-12981475 NR_002891 at chr10:5917375-5943370 (The RefSeq hits are close in score, which is why both were retained. Please note that the Methods for the track may have a mistake - we'll get back to you about that). Thanks, Jen --------------------------------- Jennifer Jackson UCSC Genome Informatics Group http://genome.ucsc.edu/ On 4/28/10 2:07 PM, Peng Yu wrote: > Hi, > > According to ucsc genome browser, NR_002891 maps to the following > genomic location. These two mappings show very different number exons. > One is 1, the other is 12. > > I don't understand why a single transcript could come from two genomic > location that have very different intro/exon structures. Are these > mappings real? Or one of them is an artifact. Or the underlining > genome assembly (mm9) is defective at one of these locations? > > NR_002891 at chr19:12979721-12981475 > NR_002891 at chr10:5917375-5943370 > > -- > Regards, > Peng > _______________________________________________ > Genome maillist - [email protected] > https://lists.soe.ucsc.edu/mailman/listinfo/genome _______________________________________________ Genome maillist - [email protected] https://lists.soe.ucsc.edu/mailman/listinfo/genome
