Search Results - "Havir, Evelyn A."

Biochemical and Developmental Characterization of Multiple Forms of Catalase in Tobacco Leaves by Evelyn A. Havir, McHale, Neil A.

“…Leaf extracts of both Nicotiana tabacum and Nicotiana sylvestris contain multiple forms of catalase ($\text{H}_{2}\text{O}_{2}\colon \text{H}_{2}\text{O}_{2}$…”
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Manipulation of catalase levels produces altered photosynthesis in transgenic tobacco plants by Brisson, L.F, Zelitch, I, Havir, E.A

“…Constructs containing the cDNAs encoding the primary leaf catalase in Nicotiana or subunit 1 of cottonseed (Gossypium hirsutum) catalase were introduced in the…”
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The in vivo and in vitro inhibition of catalase from leaves of Nicotiana sylvestris by 3-amino-1,2,4-triazole by Havir, E.A. (Connecticut Agricultural Experiment Station, New Haven, CT)

“…Seedlings of tobacco (Nicotiana sylvestris) were treated in vivo with 0.03 to 20 millimolar 3-amino-1,2,4-triazole (aminotriazole). There was a rapid loss of…”
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Enhanced-peroxidatic activity in specific catalase isozymes of tobacco, barley, and maize by Havir, E.A. (Connecticut Agricultural Experiment Station, New Haven, CT), McHale, N.A

“…Separation of catalase isozymes from leaf extracts of three diverse plant species (Nicotiana sylvestris, Zea mays, Hordeum vulgare L) revealed a distinct…”
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Leaf Catalase mRNA and Catalase-Protein Levels in a High-Catalase Tobacco Mutant with O₂-Resistant Photosynthesis by Zelitch, Israel, Evelyn A. Havir, Brian Mc Gonigle, McHale, Neil A., Nelson, Timothy

“…Experiments were conducted with a tobacco (Nicotiana tabacum) mutant with 40 to 50% greater catalase activity than wild type that is associated with a novel…”
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Contrasting modes of regulation of PS II light utilization with changing irradiance in normal and psbS mutant leaves of Arabidopsis thaliana by Peterson, Richard B, Havir, Evelyn A

“…Complementary techniques of chlorophyll a fluorescence, steady state CO(2) exchange, and O(2) release during a multiple turnover flash were applied to compare…”
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multiphasic nature of nonphotochemical quenching: implications for assessment of photosynthetic electron transport based on chlorophyll fluorescence by Peterson, R.B, Havir, E.A

“…Defining a quantitative relationship between chlorophyll a fluorescence yield and Photosystem II (PS II) function is important to photosynthesis research…”
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A Mutant of Nicotiana sylvestris Lacking Serine:Glyoxylate Aminotransferase: Substrate Specificity of the Enzyme and Fate of [2-14C]Glycolate in Plants with Genetically Altered Enzyme Levels by Evelyn A. Havir, McHale, Neil A.

“…The photorespiratory mutant of Nicotiana sylvestris, NS 349, lacking serine:glyoxylate aminotransferase (SGAT) grows in 1% CO2 but not in normal air (NA…”
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Evidence for the Presence in Tobacco Leaves of Multiple Enzymes for the Oxidation of Glycolate and Glyoxylate by Havir, E A

“…The enzymic oxidation of glycolate to glyoxylate and glyoxylate to oxalate by preparations purified from tobacco (Nicotiana tabacum var Havana Seed) leaves was…”
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Inactivation of serine:glyoxylate and glutamate:glyoxylate aminotransferases from tobacco leaves by glyoxylate in the presence of ammonium ion by Havir, E.A

“…Serine:glyoxylate and glutamate:glyoxylate aminotransferases (SGAT and GGAT), which catalyze the formation of glycine from glyoxylate during photorespiration,…”
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Oxalate metabolism by tobacco leaf discs [Formation from glyoxylate, decarboxylation, photorespiratory carbon dioxide formation] by HAVIR, E. A

“…The turnover rate of oxalate in leaf discs of Nicotiana tabacum, var Havana Seed, during photosynthesis was estimated to be 1 to 2 micromoles per gram fresh…”
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L-phenylalanine ammonia-lyase (maize), evidence for a common catalytic site for L-phenylalanine and L-tyrosine by Havir, E.A, Reid, P.D, Marsh, H.V

“…L-Phenylalanine ammonia-lyase (E. C. 4.3.1.5) from maize is active with L-tyrosine and L-phenylalanine and exhibits atypical Michaelis-Menten kinetics with…”
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Regulation of catalase activity in leaves of Nicotiana sylvestris by high CO2 by Havir, E.A, McHale, N.A

“…The effect of high CO2 (1% CO2/21% O2) on the activity of specific forms of catalase (CAT-1, -2, and -3) EA Havir, NA McHale [1987] Plant Physiol 84: 450-455)…”
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L-phenylalanine ammonia-lyase (mazie); partial purification and response to gibberellic acid and cycloheximide of L-phenylalanine and L-tyrosine ammonia-lyase activities by Reid, P.D, Havir, E.A, Marsh, H.V

“…Extracts of maize leaf sheath tissue deaminate both L-phenylalanine and L-tyrosine. The activities with both substrates are enhanced by treating the plant with…”
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L-Phenylalanine ammonia-lyase (maize, potato, and Rhodotorula glutinis). Studies of the prosthetic group with nitromethane by Havir, Evelyn A, Hanson, Kenneth R

“…Highly purified enzyme (EC 4.1.3.5) from Rhodotorula glutinis was shown by sodium dodecyl sulfate gel electrophoresis to have subunits which if not identical…”
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L-Phenylalanine ammonia-lyase (maize and potato). Evidence that the enzyme is composed of four subunits by Havir, Evelyn A, Hanson, Kenneth R

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L-Phenylalanine ammonia-lyase. II. Mechanism and kinetic properties of the enzyme from potato tubers by Havir, Evelyn A, Hanson, Kenneth R

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L-Phenylalanine ammonia-lyase. I. Purification and molecular size of the enzyme from potato tubers by Havir, Evelyn A, Hanson, Kenneth R

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Phenylalanine ammonia-lyase: enzymic conversion of 3-(1,4-cyclohexadienyl)-L-alanine to trans-3-(1,4-cyclohexadienyl)acrylic acid by Hanson, Kenneth R, Havir, Evelyn A, Ressler, Charlotte

“…The phenylalanine analogue 3-(1,4-cyclohexadienyl)-L-alanine is converted to the hitherto unknown cinnamate analogue trans-3-(1,4-cyclohexadienyl)acrylic acid…”
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A nonphotochemical-quenching-deficient mutant of Arabidopsis thaliana possessing normal pigment composition and xanthophyll-cycle activity by PETERSON, R. B, HAVIR, E. A

“…Higher-plant chloroplasts alter the distribution of absorbed radiant energy between photosynthesis and heat formation in response to changing illumination…”
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