Can ssDNA transform competent cell ?

Peter Wang plw at
Fri Nov 1 14:24:21 EST 1996

Dear Williams:

wliu at wrote:
> Does anybody know that if the purified ssDNA (isolated from bacteria
> containing phagemid after infection of helper phage RO408) can
> transform competent cells and recover the dsDNA replication mode?

Yes it should.  Transformation with phagemid ssDNA is analogous to 
infection with phagemid that has been packaged with a helper phage; once 
in the bacteria, the phage ori in single-stranded form directs priming 
and synthesis of the complementary strand by host enzymes to give dsDNA. 

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