Table 2. Fractions of each type of secondary structure in lipase covalently immobilised to amino-functionalised MWNT.

Structure	H(r)	H(d)	S(r)	S(d)	Trn	Unrd
Native enzyme	0.607	0.265	0.002	0.002	0.009	0.116
Immobilised enzyme	0.491	0.189	0.006	0.013	0.095	0.206

Abbreviations: H(r), regular α-helix; H(d), distorted α-helix; S(r), regular β sheet; s(d), distorted β sheet; Trn, Turn; Unrd, unordered. All experiments in this study were carried out in triplicate with standard deviation below 5%.