Skip to main content
. 2013 Jan 24;52(7):1236–1248. doi: 10.1021/bi301417z

Table 2. Summary of the Peak Assignments for Backbone Vibrational Modes within the Amide I′ Band (1710–1600 cm–1) As Determined by the Synchronous and Asynchronous Plots.

    Hscen1a peak position (cm–1)
Hscen2a peak position (cm–1)
Hscen3a peak position (cm–1)
peak assignment average peak position (cm–1) 5–35 °C 40–95 °C 5–35 °C 40–95 °C 5–35 °C 40–60 °C 60–90 °C
CaBS loopb 1682.8 1686.0 1687.5 1680.0 1683.7 1684.3 1682.4 1675.7
loops 1668.1 1668.8 1666.0 1666.7 1672.5 1671.4 1668.6 1662.8
π-helix 1653.1 1653.7 1652.0 1653.4 1653.7 1654.2 1654.8 1649.9
α-helix 1643.9 1642.5 1642.0 1643.4 1646.2 1641.4 1645.6 1646.1
β-sheet 1631.2 1635.0 1626.0 1636.7 1638.7 1626.3 1627.2 1628.7
a

Underlined peak positions represent the greatest intensity change (i.e., the level of perturbation or flexibility) for the auto peaks within the synchronous plot.

b

The calcium binding site (CaBS) loop would ordinarily be assigned as a β-turn, but for relevant structural discussions related to the well-known EF-hand motif, we have used the nomenclature associated with these calcium binding proteins.