Figure 6.

Double-ended zipper model of DNA hybridization. a) Duplex can only open and close from the ends in a zipper-like fashion. Between the two zipper fork positions k and l, the duplex is closed. <a onClick="popup('http://www.biomedcentral.com/2046-1682/4/20/mathml/M40','MathML',630,470);return false;" target="_blank" href="http://www.biomedcentral.com/2046-1682/4/20/mathml/M40">View MathML</a> is the sum over all closed NN parameters in the bound duplex section. b) One MM affects two NN pairs.

Trapp et al. BMC Biophysics 2011 4:20   doi:10.1186/2046-1682-4-20
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