Table 3.

Band position (cm⁻¹) and assignment of the best-fit Gaussian components of the amide I band.

	Gaussian Component Position (cm−1)			Attribution	Literature Data
Free CRL	M-CRL1	M-CRL2	M-CRL3
	1566	1539	1548	Amide II	1530–1550 [40]
	1585	1588	1587	C=O stretching of COO−	1565–1585 [40]
1609	1618	1613	1612	Intermolecular H-bonded C=O (aggregates)	1610–1620 [39]
1623	1631	1626	1629	β-sheets	1620–1650 [39]
1635
1640	1642	1639	1641	Disordered structures	1640–1650 [42]
1650	1650	1652	1650	α-helices	1650–1660 [39]
1659	1657		1658
1668	1667	1663	1666	β-turns	1660–1690 [39]
1676		1673	1673
1685	1696	1687	1685	Β-turns/β-sheets	1680–1696 [42,43]
1711	1738	1710	1711	C=O stretching of -COOH