Hello Nitish, The change is due to an update at NCBI on 27-DEC-2009.
http://www.ncbi.nlm.nih.gov/nuccore/160358777?report=genbank We hope this helps, Jennifer > Hello, > > I have a question about the mouse HMGCR gene sequence (RefSeq: > NM_008255). The > genomic size of this gene has earlier been reported to be 21514 bp in > the UCSC > genome browser. > > However, the UCSC genome browser now shows the genomic size to be > 21973 bp. > Comparison of the earlier UCSC version with the present version shows > that now > you have added 88 nucleotides in the upstream of exon 1 and 371 > nucleotides in > the downstream of 3'UTR. Please see the attached file that shows about > the added > nucleotides. > > Could you please let me know about the reason (e.g. any recent > experimental > report?) for addition of these extra nucleotides in the Exon 1 and > 3'-UTR of > this gene? > > Thanking you and expecting an early response, > > Nitish Mahapatra _______________________________________________ Genome maillist - [email protected] https://lists.soe.ucsc.edu/mailman/listinfo/genome
