It's another term for a spiral, especially when talking about spiraled strands of DNA
.... 
And when we talk about "non-specific" DNA contacts-really that is just a ... it 
means, especially when "random walk" is a synonymous term in key... [DOC] [TLE] DNA's twist to the right is not to be meddled with, so let's lose the ... [PAR] Apr 30, 2013 ... Adam Rutherford: It has a simplicity that disguises its colossal power  a ladder ... 
What you are doing is depicting the right-handed screw of DNA.