I am afraid I got wrong Primer from company

Thu Jul 5 20:10:15 EST 2001

I run my PCR with primers from a well-known company.
But when I cloned PCR product, then Sequense it for 4 times from both ends
of it. I found the primer have one extra base, which will change my DNA's
Color electropherograms clearly showed an extra high peak there.
I have contact with the company, they said they will check the primer by
"mass spec". Is there any other reliable way to check it? Whick company
could do it?


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