Table 2.

Secondary structure percentage (%) analysis of T and N in the 1600–1700 cm⁻¹ spectral range in comparison with the literature data [38,53,55].

Collagen	β-Sheet 1610–1642 cm−1	Random Coil 1642–1650 cm−1	α-Helix 1650–1660 cm−1	β-Turn 1660–1680 cm−1	β-Antiparallel 1680–1700 cm−1
T	7	36	35	16	5
N	4	19	54	19	4
[55] ASC	30	25	24	21	-
[55] PSC	26	26	30	17	-
[38] ASC	24	14	20	33	9
[53] ASC	52	16	14	13	5