I'm not exactly sure what you're asking...
Do you mean that you have two single-stranded DNA molecules that you
need to anneal together, to make a double stranded segment which you
then want to ligate into a vector? If so, just heat them up to 90
degrees C, leave to cool to room temperature and then put them on ice.
They'll anneal if they're complimentary.
Sorry if I've completely missed the point of your question!
Isaac Xin Pei wrote:
> Hi, Molecular Biologists,
>> I have designed a long sequence tag about 70mers; after obtaining the DNA
> primers, now I need to anneal them, and ligate them to my vector. Does
> anyone has a protocol for annealing the long single-complentary strand DNA
> for these works? Thanks a lot!
>> Best, Isaac