Natural Science Forum / Biology / Biology / March 2004

I m looking for human endothelial cells lines. Somebody could  help me
in my research because I do not find so many lines in ATCC.  thank you
for your assistance

during dna replication, the enz dna helicase unwinds the  double
stranded dna molecule at the "ori" site...and then it is stated in
several literatures and textbooks that an enzyme dna gyrase introduces
negative supercoil at the ori site..what is the exact interpretation

what is protein engineering
what is its application