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Fragment sizes smaller than expected

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#1 Kerry11



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Posted 09 March 2016 - 02:40 PM

Hi I was wondering if somebody could help me please.


I have created primers for plasmid groucho wt a40 DNA, optimised their annealing temperature and when loaded onto a 1% agarose gel expect to get a fragment size of 900bp and have been getting that result.


However when I took this DNA from a transgenic Drosophila and ran it alongside the plasmid DNA... where the plasmid DNA gave me a band of size 900bp the genomic dna taken from the Drosophila only gave me a band of 100bp... why is this when my expected fragment size is 900bp???




#2 bob1


    Thelymitra pulchella

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Posted 15 March 2016 - 12:07 AM

Primer binding in the drosophila is different?

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