Table 2.

Secondary structural analysis of IF7 as determined by FTIR^a

Wavenumber (cm−1)	Structural assignmentb	% of total secondary structure
1683	Turns	2
1672	Turns/loops/(0, π) β-sheet	21
1657	Loops/disordered/α-helixc	17
1644	Random-coil	38
1628	β-sheet MT, 01	22

^a Errors in the wavenumber are estimated to be ± 2 cm⁻¹.

^b There are three more bands, which have not been indicated in the table. The first one centered at 1695 cm⁻¹, whose assignment is uncertain (its contribution to the total area of the amide I band is less than the 1%). The other two bands, at 1609 and 1615 cm⁻¹, are assigned to side chains; they account for 5% of the whole area of the amide I band. The percentages of secondary structure on the third column of the table do not take into account these three bands.

^c The assignment of this band is uncertain (see text for details).