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Fig. 9.7 Formation of MV Chlide
a
by vinyl reduction of DV Chlide
a
via route 13 in
9.5.2 Spectral Shift II
Light-dependent spectral shift II was first described by Sironval et al. (
1967
)asa
photoconversion of t-LW-Pchlide
a
(E650 F655) to a Chlide
a
(E676 F690)-
apoprotein complex. Later on, that Pchlide
a
-protein complex was referred to as
reported that the photoprecursor of Chlide
a
(E676 F690) was Chlide
a
(E668 F674)
instead of t-LW-Pchlide
a
(E650 F655). The chemical nature of the chromophore
in Chlide
a
(E668 F674) is not clear however. Sironval et al
.
(
1967
), and Sironval
and Kuyper (
1972
) initially proposed that it was some kind of Pchlide
a
-Chlide
a
intermediate of an ill defined nature. Thorne (
1971
), proposed however, that the
chromophore consisted exclusively of Chlide
a
. Shift II was also confirmed by
Gassman et al. (
1968
), and by Bonner (
1969
).
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