RCA was performed according to the manufacturer instructions of Templiphi 100 amplification kit (GE Healthcare Life Sciences, Pittsburgh, USA) using 100 ng of purified genomic DNA from the virus-challenged cowpea plants. The RCA amplified products were digested with MfeI, unique restriction site present in the genome of MYMIV DNA-A and DraI, present in the genome of DNA-B and the digested products were resolved on 1% agarose gel.
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