Before revision: We emphasize that assuming the ]  existence of an elongated, hybridized form of DNA ('S-DNA') does not immediately imply DNA overstretching to consist of the complete or near-complete conversion of the molecule from B- to S-form.
After revision: We emphasize that assuming the J. van Mameren et al. PNAS 106, 18231 (2009)] existence of an elongated, hybridized form of DNA ('S-DNA') does not immediately imply DNA overstretching to consist of the complete or near-complete conversion of the molecule from B- to S-form.