I'm looking at chr11 of GRCh37/hg19.  Specifically chr11:1000000-1200000.
When BAC end sequences are displayed, I see BAC clone RP11-631g2.
I can click through it, and get a link to the end sequences:
http://genome.ucsc.edu/cgi-bin/hgc?hgsid=276735669&c=chr11&o=952561&t=1128625&g=bacEndPairs&i=RP11-613G2

When I blast those I get hits on chromosome 11.  So far, so good.

Now to double check, I entered "RP11-631g2" in NCBI's Clone
search engine.  When I do this, I get directed to one BAC end
sequence:
http://www.ncbi.nlm.nih.gov/nucgss/4698107

When I blast that sequence, it locates to chr7.


What's going on here?  Am I doing something wrong?  Should I expect
NCBI and UCSC to agree on this?  If so, who is likely to be wrong
and how do I inform the correct person?  If I order RP11-631g2
from BACPAC, what am I actually going to get?
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