passages.id: split_8_test_620_passage
passages.type: progene_text
passages.text: The native state of the fragment unfolds cooperatively in an apparent two - state transition with a stability of 3.98 +/- 0.19 kcal mol(-1) in the absence of denaturant and a corresponding m value of 1.07 +/- 0.05 kcal mol(-1) M(-1) .