Hi,

I am working on the screening of Crustacean Viruses. Meanwhile, when I screened my samples for IHHNV (amplicon size 309bp) my positive control is not working. I am getting multiple bands just below the well (gel image attached, last lane is the positive control).

Can anyone please suggest, why is it happening so?

I have carefully done conducted the experiment and repeated too, but still the problem is the same.

Please help me out in solving these issues.

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