Arne Jensen, Olav Aasmundrud , Kjell E. Eimhjellen
{"title":"Chlorophylls of photosynthetic bacteria","authors":"Arne Jensen, Olav Aasmundrud , Kjell E. Eimhjellen","doi":"10.1016/0926-6577(64)90089-0","DOIUrl":"10.1016/0926-6577(64)90089-0","url":null,"abstract":"<div><p></p><ul><li><span>1.</span><span><p>1. The chlorophylls and the corresponding phaeophytins of 18 species of photosynthetic bacteria have been characterized by paper chromatography and by absorption spectra in visible light.</p></span></li><li><span>2.</span><span><p>2. Except for one species of Rhodopseudomonas which contained bacteriochlorophyll <em>b</em>, all the Thiorhodaceae (four) and the Athiorhodaceae (nine) species investigated as well as <em>Rhodomicrobium vannielii</em> had bacteriochlorophyll <em>a</em> as the only detectable chlorophyll.</p></span></li><li><span>3.</span><span><p>3. The chlorophyll-770 of Chlorobacteriaceae (four strains or species) was found to be spectroscopically and chromatographically identical with bacteriochlorophyll <em>a</em>.</p></span></li><li><span>4.</span><span><p>4. The chlorobium chlorophylls-650 and -660 were each separated by paper chromatography into three fractions. In the case of chlorobium chlorophyll-650 two of the fractions each gave rise to one phaeophytin, whereas the last fraction gave three phaeophytins. All phaeophytins had identical absorption spectra, but exhibited different <em>R</em><sub><em>F</em></sub>-values on paper chromatograms.</p></span></li><li><span>5.</span><span><p>5. In addition to the chlorophylls mentioned above, all the species of the Chlorobacteriaceae contained trace amounts of a hitherto undescribed chlorophyllous pigment.</p></span></li><li><span>6.</span><span><p>6. A revision of the current nomenclature for bacterial chlorophyll is proposed.</p></span></li></ul></div>","PeriodicalId":100169,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects","volume":"88 3","pages":"Pages 466-479"},"PeriodicalIF":0.0,"publicationDate":"1964-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6577(64)90089-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"23800716","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}
{"title":"Studies on the surface and cytoplasmic membranes of Ehrlich ascites carcinoma cells","authors":"Donald F. Hoelzl Wallach, Donna Ullrey","doi":"10.1016/0926-6577(64)90104-4","DOIUrl":"10.1016/0926-6577(64)90104-4","url":null,"abstract":"<div><p>A membrane fraction isolated from Ehrlich ascites carcinoma microsomes contians an ATP phosphohydrolas which is strongly stimulated by K<sup>+</sup> in the presence of Na<sup>+</sup>. The enzyme system has an absolute requirement for Na<sup>+</sup> and Mg<sup>2+</sup>, but a number of monovalent cations can simulate K<sup>+</sup>. Ca<sup>2+</sup>, ADP and ouabain are inhibitory. The enzyme is believed to be associated with plasma membrane fragments.</p><p>The quantitative relationships between enzyme activity and reactant concentration is presented and the probable relationship between ion transport in the whole cell and the alkali-cation-sensitive ATP phosphohydrolase is discussed.</p></div>","PeriodicalId":100169,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects","volume":"88 3","pages":"Pages 620-629"},"PeriodicalIF":0.0,"publicationDate":"1964-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6577(64)90104-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"23802391","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}
{"title":"Effect of electric field on F-actin oriented by flow","authors":"Shoyu Kobayashi","doi":"10.1016/0926-6577(64)90097-X","DOIUrl":"10.1016/0926-6577(64)90097-X","url":null,"abstract":"<div><p>Pulsed electric fields were applied to F-actin oriented by flow and the process of dis- orientation was followed by birefringence measurements. An electric field parallel to the filament axis of F-actin produced a large disorientation effect whereas a perpendicular field produced a small effect. The analysis of the birefringence decrease in normal and reversed pulses at various field strengths suggests that F-actin has a large permanent dipole moment perpendicular to the filament axis. The marked disorientation effect of the parallel field on F-actin vanished on addition of H-meromyosin. On dissociation of the complex of F-actin and H-meromyosin by the addition of ATP the disorientation effect of the parallel field was again observed. This result suggests that a strong electric interaction exists between (permanent) dipoles of F-actin and H-meromyosin.</p></div>","PeriodicalId":100169,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects","volume":"88 3","pages":"Pages 541-552"},"PeriodicalIF":0.0,"publicationDate":"1964-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6577(64)90097-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77534719","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}
{"title":"Photoreduction of nicotinamide-adenine dinucleotide by a cell-free system from Chromatium","authors":"S.L. Hood","doi":"10.1016/0926-6577(64)90088-9","DOIUrl":"10.1016/0926-6577(64)90088-9","url":null,"abstract":"<div><p>A small particle fraction has been prepared from <em>Chromatium</em> which reduces NAD by both photo and dark reactions. The reductions are stimulated by the addition of two <em>Chromatium</em> enzymes, a flavoprotein and cyrstalline ferredoxin.</p></div>","PeriodicalId":100169,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects","volume":"88 3","pages":"Pages 461-465"},"PeriodicalIF":0.0,"publicationDate":"1964-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6577(64)90088-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"23800715","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}
{"title":"Influence of cysteine on the photochemical decomposition of thymidyl-(5′-3′)-bromodeoxyuridine","authors":"A. Haug","doi":"10.1016/0926-6577(64)90090-7","DOIUrl":"10.1016/0926-6577(64)90090-7","url":null,"abstract":"<div><p>Irradiating a solution of thymidyl-(5′-3′)-bromodeoxyuridine with monochromatic, ultraviolet light yields one main photo-product, an intramolecular dimer, containing no Br and a cyclobutene ring structure. In the presence of cysteine and ultraviolet radiation the dimer is further decomposed to a photo-product characterized by an end-absorption spectrum. This compound contains one S atom per dinucleotide and cannot be reverted by irradiation at 2400 Å. The quantum yields of this sulfhydryl addition are measured as a function of wavelength. The reaction kinetics and the biological implication of this process, which is possibly radio-protective, are discussed.</p></div>","PeriodicalId":100169,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects","volume":"88 3","pages":"Pages 480-486"},"PeriodicalIF":0.0,"publicationDate":"1964-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6577(64)90090-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87755988","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}
{"title":"Evidence of bacteriochlorophyll dimerization in the chlorophyll-protein complex from green photosynthetic bacteria","authors":"John M. Olson","doi":"10.1016/0926-6577(64)90113-5","DOIUrl":"10.1016/0926-6577(64)90113-5","url":null,"abstract":"","PeriodicalId":100169,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects","volume":"88 3","pages":"Pages 660-662"},"PeriodicalIF":0.0,"publicationDate":"1964-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6577(64)90113-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"23802398","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}
{"title":"Inhibition of greening of heat-bleached Euglena by streptomycin","authors":"John L. Mego","doi":"10.1016/0926-6577(64)90114-7","DOIUrl":"10.1016/0926-6577(64)90114-7","url":null,"abstract":"","PeriodicalId":100169,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects","volume":"88 3","pages":"Pages 663-665"},"PeriodicalIF":0.0,"publicationDate":"1964-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6577(64)90114-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"23802399","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}
{"title":"Observations on the fluorescence emitted by slices of rat liver and avian salt gland","authors":"G.D.V. Van Rossum","doi":"10.1016/0926-6577(64)90094-4","DOIUrl":"10.1016/0926-6577(64)90094-4","url":null,"abstract":"<div><p>The fluorescence emitted by slices of rat liver and sea-gull salt gland which were irradiated with light at 366 mμ, showed a peak at 468 mμ under aerobic conditions. The intensity of the fluorescence decreased during the early stages of incubation of 38°, due largely to the effects of the ultraviolet exciting radiation. Under aeobic conditions of incubation the fluorescence intensity fell by 40–60, and the remained relatively constant for a period of several hours; in anaerobic conditions the fall in intensity continued to lower levels. During the period in which the fluorescence of aerobic slices constant, quantitatively reproducible increases in tissue fluorescence were caused by the onset of tempory anoxia, by the addition of succinate to the medium and by the treatments which stimulated ion transport in the slices.</p></div>","PeriodicalId":100169,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects","volume":"88 3","pages":"Pages 507-516"},"PeriodicalIF":0.0,"publicationDate":"1964-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6577(64)90094-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72908467","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}