I made a construct of unknown gene in a vector and sequenced. The sequenced data did not match with the expected sequence. How can I troubleshoot this?
Was it completely incorrect, or were there gaps? Have you run a PCR product on a gel to determine if the size of the amplicon is as expected? You can also verify proper amplification by restriction digest.
Assuming the issue isn't just a matter of gaps, it's critical to determine you are amplifying the right product. Is your input sample a plasmid?