weird microsatellite

Martin Kennedy mkennedy at
Sun Mar 27 22:21:27 EST 1994

In article <0097BF8A.E8C25A59.789 at BSCR.UGA.EDU>, mcgraw at BSCR.UGA.EDU writes:
> We've got a really weird microsatellite (dinucleotide repeat) marker.
> It's made from a nice-looking CA repeat, and we get some perfectly normal-
> looking products, BUT...  In the animals that we've looked at, we see
> either one allele or nothing.  In those animals showing one allele, we
> see the various sizes that we would expect from a polymorphic micro-
> satellite, but we never see a heterozygote.  It's not just the boys or just
> > the girls.  Has anyone out there seen something like this?  Any speculations
> on what it might be?
> thanks,
> 	Al McGraw


Try looking at Koorey et al., 1993. Human Molecular Genetics 2, 289-291.  They
found allele non-amplification, often due to a single base substitution at the
3'-end of one of the primers, caused this sort of effect.  Try making a new
primer at a different site.


NNNN   NN  Martin A Kennedy (E-mail = mkennedy at  ZZZZZZZ  
NN NN  NN       Cytogenetic and Molecular Oncology Unit          ZZZ
NN  NN NN           Christchurch School of Medicine            ZZZ
NN   NNNN              Christchurch, New Zealand              ZZZZZZZ
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