Table 1.

Transition temperatures (T _m) of selected CD bands or band pairs for WT and dgd1 thylakoid membranes

CD signal (nm)	Assignment	T m′ °C (WT)	T m′ °C (dgd1)
685–730	Ψ-type	54 ± 2	48 ± 1
685–671	Ψ-type	54 ± 1	49 ± 1
505–550	Ψ-type	56 ± 1	51 ± 1
610–650	Excitonic (Chl b, LHCII)	61 ± 2	58 ± 2
448–459	Excitonic (Chl a)	59 ± 2	54 ± 1
448–438	Excitonic (Chl a)	57 ± 1	50 ± 1

The membranes were thermostated for 10 min at different temperatures in the range between 5 and 80°C before recording the CD spectra at the given temperature; the amplitudes for the individual bands were calculated from the difference in the intensity at specific wavelengths (see also the text). T _m is defined as the temperature at which the intensity of the CD band is decreased to 50% of its value at 25°C. The values for T _m and their standard errors are determined from five independent experiments