Carbon Dioxide Fixation by Detached Cereal Caryopses

Carbon dioxide fixation by detached cereal caryopses.

Immature detached cereal caryopses from barley (Hordeum vulgare L. var distichum cv Midas) and wheat (Triticum aestivum L. cv Sicco) were shown to be capable of fixing externally supplied (14)CO(2) in the light or dark. Green cross cells and the testa contained the majority of the (14)C-labeled material. Some (14)C-labeled material was also found in the outer, or transparent, layer and in the e...

Carbon Dioxide Fixation by Detached Cereal Caryopses1

Immature detached cereal caryopses from barley (Hordeum vulgare L. var distichum cv Midas) and wheat (Triticum aestivum L. cv Sicco) were shown to be capable of fixing externally supplied"'CO2 in the light or dark. Green cross cells and the testa contained the majority of the 14Clabeled material. Some "4C-labeled material was also found in the outer, or transparent, layer and in the endosperm/e...

Carbon dioxide fixation by Rhodopseudomonas capsulatus.

Carbon Dioxide Fixation by Extracts of Streptococcus

sence of exogenously added glutamate and pyridoxal-5'-phosphate and produced radioactive aspartate in the presence of these components. Reduced nicotinamide adenine dinucleotide or reduced nicotinamide adenine dinucleotide phosphate could not be substituted for adenosine triphosphate (ATP); phosphoenolpyruvate even in the presence of nucleoside diphosphates could not replace pyruvate plus ATP; ...

Fixation of carbon dioxide by a plant oxalacetate carboxylase.

The presence of an oxalacetate carboxylase in parsley root has been reported previously from this laboratory.’ The reaction catalyzed by this system has been found to be reversible, since it fixes Cl402 into oxalacetate during the decarboxylation of the latter in the presence of NaHC1403. The enzyme was prepared essentially as previously reported’ and completely freed from pyruvic carboxylase b...