TY - JOUR A1 - Bast, K. A1 - Christl, Manfred A1 - Huisgen, R. A1 - Sustmann, R. T1 - Zur Anlagerung des Benzonitriloxids an α,β-ungesättigte Carbonsäureester N2 - No abstract available KW - Organische Chemie Y1 - 1973 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-57912 ER - TY - JOUR A1 - Scheer, Ulrich A1 - Trendelenburg, Michael F. A1 - Franke, Werner W. T1 - Transcription of ribosomal RNA cistrons: Correlation of morphological and biochemical data N2 - Electron microscopic spread preparations of oocyte nucleoli (lampbrush stage) of various amphibians are quantitatively evaluated and the length distributions of repeat-, matrix-, and spacer-units along the rRNA cistron containing axes are given. The correlation of the matrix unit data with the gel electrophoretic pattern of labelled nuclear RNA from the same oocytes is examined. The mean value of the matrix unit corresponds fairly well to a 2.6 million D peak of pre-rRNA but the distribution of both matrix units and labelled pre-rRNAs shows an asymmetrical heterogeneity indicating the existence of some larger primary transcription products of rDNA. Novel structural aspects are described in the spacer regions which suggest that transcription does also take place in DNP regions between the matrix units. A special "prelude piece" coding for approx. 0.5 million D of RNA is frequently visualized in the spacer segments at the beginning of a matrix unit. Possible artifacts resulting from the preparation, the relative congruence between the data obtained using both methods, and the functional meaning of the findings are discussed against the background of current concepts of structural organization and transcription products of nucleolar DNA. Y1 - 1973 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-32195 ER - TY - JOUR A1 - Trendelenburg, Michael F. A1 - Scheer, Ulrich A1 - Franke, W. W. T1 - Structural organization of the transcription of ribosomal DNA in oocytes of the house cricket N2 - No abstract available Y1 - 1973 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-33113 ER - TY - JOUR A1 - Derksen, J. A1 - Trendelenburg, Michael F. A1 - Scheer, Ulrich A1 - Franke, Werner W. T1 - Spread chromosomal nucleoli of Chironomus salivary glands N2 - No abstract available Y1 - 1973 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-32209 ER - TY - JOUR A1 - Bast, K. A1 - Christl, Manfred A1 - Huisgen, R. A1 - Mack, W. T1 - Relative Dipolarophilen-Aktivitäten bei Cycloadditionen des Benzonitriloxids N2 - No abstract available KW - Organische Chemie Y1 - 1973 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-57935 ER - TY - JOUR A1 - Huisgen, R. A1 - Christl, Manfred T1 - Reaktionen der Knallsäure mit ungesättigten Verbindungen N2 - No abstract available KW - Organische Chemie Y1 - 1973 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-57927 ER - TY - JOUR A1 - Sebald, Walter A1 - Machleidt, W. A1 - Otto, J. T1 - Products of mitochondrial protein synthesis in Neurospora crassa. Determination of equimolar amounts of three products in cytochrome oxidase on the basis of amino-acid analysis N2 - Cytochrome oxidase isolated from N eurospora crassa was resolved into seven protein eomponents by eleetrophoresis in polyaerylamide gels eontaining sodium dodeeylsulfate. The apparent molecular weights were determined tobe 41000, 28500, 21000, 16000, 14000, 11500 and 10000 for the eomponents 1, 2, 3, 4, 5, 6, and 7, respectively. The components 1, 2 and 3 are synthesized on mitochondrial ribosomes as shown by the incorporation of radioactive amino aeids in the presenee of cyeloheximide. Amino-acidanalysis of the isolated components 1, 2 and 3 revealed a high content of apolar amino acids and a low eontent of basic amino aeids compared to an average amino-aeid eomposition of components 4-7. Components 1, 2 and 3 eontribute 27.9°/0, 18°/0 and 14.2°/0 to the whole eytoehrome oxidase protein. This was calculated from the contributions of the single eomponents to the totalleueine eontent of the enzyme and the leueine eontents (nmol leueine per mg protein) of the single eomponents as determined by amino-aeid analysis. Equimolar relations of the components 1, 2 and 3 are found by dividing the amounts of protein by their apparent molecular weights. A stoichiometry of 1:1:1 results assuming a minimal molecular weight of 150000 for the whole cytochrome oxidase protein. On the basis of the heme a content a molecular weight of about 70000 per heme group was determined, using an absorption coeffieient L1e605 (redueed minus oxidized) of 12 mM-1 cm-1• It is concluded that the smallest structural unit of eytochrome oxidase contains two heme groups. KW - Biochemie Y1 - 1973 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62827 ER - TY - CHAP A1 - Cranach, Mario von A1 - Ellgring, Johann Heinrich T1 - Problems in the recognition of gaze direction N2 - No abstract available Y1 - 1973 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-42147 ER - TY - JOUR A1 - Christl, Manfred A1 - Huisgen, R. T1 - Orientierungsphänomene bei der Cycloaddition aliphatischer und aromatischer Nitriloxide an α,β-ungesättigte Carbonester N2 - No abstract available KW - Organische Chemie Y1 - 1973 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-57942 ER - TY - JOUR A1 - Unkelbach, K. H. A1 - Becker, Charles R. A1 - Köhler, H. A1 - Middendorff, A. V. T1 - Optical Phonons of Bi\(_2\)Te\(_3\) N2 - No abstract available Y1 - 1973 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-30809 ER -