Table 1. Curve-Fitting Analysis of Amide I Raman Band Profile of Insulin and Its Aggregates, as Obtained at Different Time Points of Incubationa.
species
formations |
||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
α-helix |
organized β-sheet |
loose β-strand, PPII and disordered components |
other
disordered components (undefined components) |
|||||||||
time (min) | peak (cm–1) | % A | width (cm–1) | peak (cm–1) | % A | width (cm–1) | peak (cm–1) | % A | width (cm–1) | peak (cm–1) | % A | width (cm–1) |
0 | 1658 | 54 | 28 | 1676 | 9 | 21 | 1686 | 24 | 27 | 1630 | 13 | 25 |
60 | 1659 | 50 | 28 | 1676 | 8 | 19 | 1687 | 28 | 31 | 1637 | 14 | 27 |
120 | 1660 | 46 | 27 | 1675 | 12 | 22 | 1687 | 21 | 26 | 1644 | 21 | 35 |
135 | 1656 | 37 | 19 | 1673 | 29 | 20 | 1690 | 22 | 26 | 1639 | 12 | 17 |
160 | 1656 | 29 | 20 | 1675 | 41 | 19 | 1691 | 16 | 25 | 1639 | 14 | 20 |
180 | 1655 | 14 | 18 | 1674 | 62 | 18 | 1690 | 14 | 23 | 1642 | 10 | 16 |
Percentage of areas (% A) and the bandwidth of each fitted component band are shown.