Sequence/restriction map of ura3-52

[B7JM]

Dear yeast netters,
   I am a newcomer to S cerevisiae and would like to
know, what is the best source for information such as
the sequences or restriction maps of mutant (and wild-type)
alleles that are in common use - e.g. ura3-52 and URA3?
I imagine the sequences are in genbank somewhere, but is
there some more specific source for these things?  Along
the same line, is there an electronic catalogue of strains
and their idiosyncracies?
   Thanks in advance for any help.
                                  Cliff Zeyl
                                  McGill University
                                  B7JM at MUSICB.MCGILL.CA