glyoxylate reductase/spinacia oleracea

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Inhibition of Spinach Leaf NADPH(NADH)-Glyoxylate Reductase by Acetohydroxamate, Aminooxyacetate, and Glycidate.

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Prijava / prijava

Acetohydroxamate (AHA) and aminooxyacetate (AOA) were found to be potent inhibitors of purified NADPH(NADH)-dependent glyoxylate reductase from spinach (Spinacia oleracea) leaves. AHA was a noncompetitive (ro mixed) inhibitor of the NADPH-dependent activity of the reductase with a K(i) of 0.33

Purification and characterization of a novel NADPH(NADH)-dependent glyoxylate reductase from spinach leaves. Comparison of immunological properties of leaf glyoxylate reductase and hydroxypyruvate reductase.

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Prijava / prijava

A novel reductase displaying high specificity for glyoxylate and NADPH was purified 3343-fold from spinach leaves. The enzyme was found to be an oligomer of about 125 kDa, composed of four equal subunits of 33 kDa each. A Km for glyoxylate was about 14-fold lower with NADPH than with NADH (0.085 and

Localization and properties of hydroxypyruvate and glyoxylate reductases in spinach leaf particles.

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Isolation of intact chloroplasts and other cell organelles from spinach leaf protoplasts.

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Freshly prepared spinach leaf protoplasts were gently ruptured by mechanical shearing followed by sucrose density gradient centrifugation to separate constituent cell organelles. The isolation of intact Class I chloroplasts (d = 1.21) in high yield, well separated from peroxisomes and mitochondria,

A survey of plants for leaf peroxisomes.

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Leaves of 10 plant species, 7 with photorespiration (spinach, sunflower, tobacco, pea, wheat, bean, and Swiss chard) and 3 without photorespiration (corn, sugarcane, and pigweed), were surveyed for peroxisomes. The distribution pattern for glycolate oxidase, glyoxylate reductase, catalase, and part

Subcellular Location of NADPH-Dependent Hydroxypyruvate Reductase Activity in Leaf Protoplasts of Pisum sativum L. and Its Role in Photorespiratory Metabolism.

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Prijava / prijava

Protoplasts purified from pea (Pisum sativum L.) leaves were lysed and fractionated to assess the subcellular distribution of NADPH-dependent hydroxypyruvate reductase (NADPH-HPR) activity. Rate-zonal centrifugation and sucrose-gradient experiments demonstrated that most (about 70%) of the NADPH-HPR

Isolation of microbodies from plant tissues.

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Specialized microbodies have previously been isolated and characterized from fatty seedling tissues (glyoxysomes) and leaves (leaf peroxisomes). We have now examined 11 other plant tissues, including tubers, fruits, roots, shoots, and petals, and find that all contain particulate catalase, a

The enzymic reduction of glyoxylate and hydroxypyruvate in leaves of higher plants.

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Prijava / prijava

Glyoxylate and hydroxypyruvate are metabolites involved in the pathway of carbon in photorespiration. The chief glyoxylate-reducing enzyme in leaves is now known to be a cytosolic glyoxylate reductase that uses NADPH as the preferred cofactor but can also use NADH. Glyoxylate reductase has been

Effects of glyoxylate on photosynthesis by intact chloroplasts.

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Prijava / prijava

Because glyoxylate inhibits CO(2) fixation by intact chloroplasts and purified ribulose bisphosphate carboxylase/oxygenase, glyoxylate might be expected to exert some regulatory effect on photosynthesis. However, ribulose bisphosphate carboxylase activity and activation in intact chloroplasts from

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