Photoconversion of chlorophyllide 684 to chlorophyllide 678
نویسندگان
چکیده
منابع مشابه
The sites of photoconversion of protochlorophyllide to chlorophyllide in barley seedlings.
The photoreduction of protochlorophyllide a to chlorophyllide a in intact 6-day-old seedlings of etiolated barley (Hordeum vulgare) exhibits a small initial phase, followed by an induction period of about 1 hour before a rapid phase of additional chlorophyll formation begins. Cycloheximide, an inhibitor of protein synthesis, has no effect on the initial phase of conversion of preformed protochl...
متن کاملChlorophyll Formation in Greening Bean Leaves during the Early Stages.
In the evolution of the absorption spectrum of etiolated bean leaves (Phaseolus vulgaris L.) following illumination, a rapid photoconversion of 50% or more of the active protochlorophyllide at room temperature is followed by a shift of the chlorophyll(ide) absorption maximum: C(678)--> -->C(684)-->C(672 nm). Kinetic studies at 2 C and the absence of an isosbestic point provide evidence for an i...
متن کاملThe Role of NADPH in the Reversible Phototransformation of Chlorophyllide P682 into Chlorophyllide P678 in Etioplasts of Oat
Absorption spectra and room temperature fluorescence variations upon light excitation were studied in etioplasts in which the protochlorophyllide had been reduced to chlorophyllide prior to the experiment. In the presence of 1 mM NADPH, the absorption band was located around 682 nm and the fluorescence variations reflected the occurrence of the chlorophyllide microcycle (reversible phototransfo...
متن کاملAnalysis of the subunit structure of protochlorophyllide holochrome by sodium dodecyl sulfate-polyacrylamide gel electrophoresis.
The subunit structures of protochlorophyllide holochrome (PCH) and chlorophyllide holochrome (CH) were studied by sodium dodecyl sulfate (SDS)-polyacrylamide gel electrophoresis. PCH from leaves of dark-grown (Phaseolus vulgaris var. red kidney) is a polymeric pigment-protein complex of approximately 600,000 daltons. It is composed of 12 to 14 polypeptides of 45,000 daltons, when examined prior...
متن کاملChlorophyllase and Formation of an Atypical Chlorophyllide in Marine Algae.
In the course of a study of the pigment composition of some marine algae (6) certain organisms were found to possess highly active systems capable of converting chlorophyll a to chlorophyllide derivatives. Two chlorophyllides could be obtained from the diatom Phaeodactylnin tricornutunt (Bohlin) depending on the conditions of incubation. One possessed a spectrum identical with chlorophyll a, an...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: FEBS Letters
سال: 1972
ISSN: 0014-5793
DOI: 10.1016/0014-5793(72)80105-4