If you know the DNA sequence then you can order it from IDT. Not sure, if they would deliver to your location.
Hello Vinoth Raja ,
Do you have a specific application in mind or are you simply trying to perform a rapid test to confirm behaviour?
There are many suppliers of oligonucleotides and you can often design your own sequences. Sigma Aldrich offers one of the easiest services for simple systems that I have come across:
https://www.sigmaaldrich.com/life-science/custom-oligos.html
Of course, for the probe you often want an anchoring group, such as a thiol (-SH) followed by a spacer sequence (such as PEG) to distance the label sequence from the anchor and sometimes to add flexibility. As for the label of the target sequence, it is often wise to purchase a series of mismatches (mismatch at the centre, and at the 5' and 3' positions) as well as the complete mismatch sequence.
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