Fluorescence of native and carotenoid-depleted LH2 from Chromatium minutissimum,originating from simultaneous two-photon absorption in the spectral range of the presumed (optically 'dark') S(1) state of carotenoids |
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Authors: | Krikunova M Kummrow A Voigt B Rini M Lokstein H Moskalenko A Scheer H Razjivin A Leupold D |
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Affiliation: | Department of Biological Mechanisms and Functions, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa-ku, 464-8601, Nagoya, Japan. kato@agr.nagoya-u.ac.jp |
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Abstract: | The Aspergillus nidulans CCAAT-binding complex (Hap complex) consists of at least three subunits, HapB, HapC and HapE. To investigate the quantity control mechanisms of the subunits during assembly of the Hap complex, reconstitution studies with the recombinant subunits and extracts prepared from the respective hap subunit deletion mutants were carried out. Furthermore, Western blot analysis of the Hap subunits and Northern blot analysis of the hap genes with the respective deletion mutants were also performed. From all the results together, it was suggested that the number of the HapC molecule could adjust that of the HapE molecule by forming stable heterodimers prior to assembly of the Hap complex. |
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