Silent ClaI sites - info ?

[Jeremy Weinman]

Silent ClaI sites

Does anybody out there in netland know of any info (published or otherwise)
on why ClaI sometimes doesn't recognize a ClaI site?  We've got some clones
which we have been mapping and we have a cla site that cuts on the basis of
some unknown or perhaps archane variable, seemingly regardless of how well
other cla sites in the clone are cutting.  Any thoughts?
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Dr. Jeremy Weinman                              Email: 
jjw at rsbs1.anu.edu.au
Plant Microbe Interaction Group                 Phone:  61 6 2495051
Research School of Biological Sciences          Fax:    61 6 2490754
Australian National University                  Snail:  PO Box 475,
Canberra,
                                                        ACT 2601, AUSTRALIA