Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects最新文献_第7页

Kinetics of light-induced cytochrome oxidation and P840 bleaching in green photosynthetic bacteria under various conditions 不同条件下绿色光合细菌光诱导细胞色素氧化和P840漂白动力学

Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects Pub Date : 1964-07-29 DOI: 10.1016/0926-6577(64)90167-6

Chr. Sybesma, W.J. Vredenberg

引用次数: 24

The uptake of potassium by baker's yeast from potassium acetate 面包酵母从醋酸钾中吸收钾

Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects Pub Date : 1964-07-29 DOI: 10.1016/0926-6577(64)90174-3

P. Finbarr Duggan

引用次数: 1

Electron-spin-resonance spectra of spinach phosphodoxin and spinach chloroplasts 菠菜磷还毒素和菠菜叶绿体的电子自旋共振谱

Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects Pub Date : 1964-07-29 DOI: 10.1016/0926-6577(64)90153-6

Clanton C. Black, John J. Heise , Anthony San Peitro

引用次数: 1

Perméabilité au calcium du manteau de lamellibranches d'eau douce étudiée à l'aide des isotopes 45Ca et 47Ca 用同位素45Ca和47Ca研究了淡水层膜的钙渗透性

Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects Pub Date : 1964-07-29 DOI: 10.1016/0926-6577(64)90175-5

M. Istin, J. Maetz

引用次数: 23

Studies on the bioluminescence of Renilla renoformis Renilla renformis的生物发光研究

Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects Pub Date : 1964-07-29 DOI: 10.1016/0926-6577(64)90157-3

Milton J. Cormier , Kazuo Hori

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引用次数: 21

The influence of ionic strength and organic solvents on acid transitions of proteins 离子强度和有机溶剂对蛋白质酸转变的影响

Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects Pub Date : 1964-07-29 DOI: 10.1016/0926-6577(64)90161-5

Charles C. Bigelow , Thomas A. Krenitsky

{"title":"The influence of ionic strength and organic solvents on acid transitions of proteins","authors":"Charles C. Bigelow , Thomas A. Krenitsky","doi":"10.1016/0926-6577(64)90161-5","DOIUrl":"10.1016/0926-6577(64)90161-5","url":null,"abstract":"<div><ul><li>1.1. The influence of ionic strength, dioxane, and ethylene glycol on the acid transition of ribonuclease has been studied by difference spectrophotometry. In this transition two of the three buried tyrosyl residues of the molecule can be normalized if the temperature is high enough, but an increase in the ionic strength will repress the normalization of one of them. Dioxane makes the normalization of the second one easier, and ethylene glycol has very little effect.</li><li>2.2. Dioxane also raises the pK of the transition. Ribonuclease, serum albumin, and acetic acid all show the same dependence of Δ pK on dioxane concentration, suggesting that the increase is caused by a change in the bulk dielectric constant of the medium. Chymotrypsinogen is much more strongly affected, and lysozyme is less strongly affected.</li><li>3.3. The denaturation of ribonuclease at pH 2.3 by dioxane shows some very unusual features. The difference spectra are anomalous. The denaturation is very strongly affected by the ionic strength, and in an opposite direction to what is usually observed: denaturation occurs at lower dioxane concentrations as the ionic strength is raised. A possible explanation for these unusual features is based on Weber's observation that dioxane first denatures ribonuclease, and at higher concentrations promotes the formation of helical regions in the molecule.</li></ul></div>","PeriodicalId":100169,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1964-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6577(64)90161-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40765812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Electric moments and cholinesterase inhibitory properties of selected N-alkyl substituted amides n -烷基取代酰胺的电矩和胆碱酯酶抑制性能

Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects Pub Date : 1964-07-29 DOI: 10.1016/0926-6577(64)90178-0

William P. Purcell , James G. Beasley , Ronald P. Quintana

引用次数: 8

The electron-transport components of the organ of Electrophorus electricus 电鳗器官的电子传递成分

Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects Pub Date : 1964-07-29 DOI: 10.1016/0926-6577(64)90158-5

Britton Chance, Chuan-Pu Lee, Reiko Oshino

{"title":"The electron-transport components of the organ of Electrophorus electricus","authors":"Britton Chance, Chuan-Pu Lee, Reiko Oshino","doi":"10.1016/0926-6577(64)90158-5","DOIUrl":"10.1016/0926-6577(64)90158-5","url":null,"abstract":"<div><ul><li>1.1. Examination of fractions of the main organ of Electrophorus indicates in the “proteinase preparation” an oxidation-reduction system containing cytochromes a3, a, c1, c and b. The b component is anomalous in that its antimycin response shows a double band.</li><li>2.2. The “blendor preparation” reveals small amounts of the above cytochromes in the presence of larger amounts of electron-transfer pigments which cannot be identified with known cytochromes.</li><li>3.3. The capability for electron transfer in the organ is small when the calculated rate of oxidative phosphorylation is compared with the rate of glycolysis. It is found that glycolysis can produce ATP at about 90 times the rate as could oxidative phosphorylation in the electric tissue.</li><li>4.4. These data are consistent with the inhibitor insensitivity of the electric discharge of the main organ to anoxia and terminal respiratory inhibitors and confirm the view that glycolytic energy sources are employed in maintaining ionic gradients in the main organ of Electrophorus.</li></ul></div>","PeriodicalId":100169,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1964-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6577(64)90158-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40766004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Electron-paramagnetic-resonance studies of the chlopromazine free radical formed during enzymic oxidation by peroxidase-hydrogen peroxide 氯丙嗪自由基在过氧化物酶-过氧化氢酶氧化过程中形成的电子顺磁共振研究

Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects Pub Date : 1964-07-29 DOI: 10.1016/0926-6577(64)90160-3

L.H. Piette, G. Bulow, Isao Yamazaki

{"title":"Electron-paramagnetic-resonance studies of the chlopromazine free radical formed during enzymic oxidation by peroxidase-hydrogen peroxide","authors":"L.H. Piette, G. Bulow, Isao Yamazaki","doi":"10.1016/0926-6577(64)90160-3","DOIUrl":"10.1016/0926-6577(64)90160-3","url":null,"abstract":"<div><ul><li>1.1. The tranquilizing drug chlorpromazine was enxymically oxidized to the freeradical intermadiate which was identical with the red intermediate observed optically at 530 mμ.</li><li>2.2. The stiochiometry for the peroxidaseH2O2 reaction was detemrined to be <figure><img></figure></li><li>3.3. The dismutation reaction rate constant, kd, at pH 4.8 was measured to be 15.0 M−1·sec−. This extreme stability of the free radical allowed further oxidation of the free radical by the enzyme in the substrate-limited case; the rate constant for this reaction was found to be 3.9·10−1, approx. 10 times slower than k4, the first oxidation.</li><li>4.4. It is suggested that the stability of the free radical may be responsible for the psychotropic activity of the drug.</li></ul></div>","PeriodicalId":100169,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1964-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6577(64)90160-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40765811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 110

Myoglobin free-radicals 肌红蛋白自由基

Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects Pub Date : 1964-07-29 DOI: 10.1016/0926-6577(64)90179-2

N. Kelso King, F.D. Looney, M.E. Winfield

引用次数: 15