DNA thermal denaturation by polymer field theory approach: effects of the environment

We analyse the effects of environment (solvent quality, presence extended structures - crowded environment) that may have impact on order transition between denaturated and bounded DNA states lead to changes in scaling laws govern conformational properties strands. find studied significantly influence strength first transition. To this end, we re-consider Poland-Scheraga model apply a polymer field theory calculate entropic exponents associated with loop distribution. For $d = 3$ case, corresponding diverging $\epsilon 4-d$ expansions are evaluated by restoring their convergence via resummation technique. space dimension 2$, deduced from mapping onto two-dimensional random lattice, i.e., quantum gravity. also show is further strengthened impenetrable regions solvent restrict number macromolecule configurations.