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TL;DR

This paper defends the validity of a scaling analysis for finite DNA chains, countering recent claims that questioned its applicability to experimental lengths.

Contribution

It clarifies that the scaling analysis from a 2000 study remains valid for finite chains, contrary to recent criticisms.

Findings

Scaling analysis is valid for finite DNA chains relevant to experiments

Counter-argument to recent claims about the analysis's limitations

Supports the original interpretation of DNA denaturation transition

Abstract

It is shown that the scaling analysis presented in Phys. Rev. Lett. 85, 4988 (2000) is valid for finite chains of lengths relevant to experiments, in contrast to a recent claim made by A. Hanke and R. Metzler in cond-mat/0110164.