Results 161 to 170 of about 26,108 (196)
Some of the next articles are maybe not open access.
Synthesis of the C13-C23 Segment of Tedanolide
Synlett, 2005AbstractFor Abstract see ChemInform Abstract in Full Text.
Gunnar Ehrlich, Markus Kalesse
openaire +1 more source
Immunodominant RNA recognition motifs of human nucleolin/C23
Molecular Immunology, 1995Nucleolin/C23 is a nucleolar phosphoprotein implicated in the synthesis, processing and transport of ribosomal RNA and gene transcription. Auto-antibodies to human nucleolin/C23 have been reported in patients with systemic lupus erythematosus and other systemic autoimmune disorders.
B C, Valdez +4 more
openaire +2 more sources
Nucleolin (C23), a physiological substrate for casein kinase II
Biochemical and Biophysical Research Communications, 1988Nucleolin (C23), a 110 kDa phosphoprotein, which is mainly found in the nucleolus has been shown to be a physiological substrate for casein kinase II (CKII). Nucleolin was identified and characterized by immunodetection using an anti-nucleolin antibody.
Schneider, H R, Issinger, O G
openaire +3 more sources
Localization of phosphoprotein C23 in nucleoli by immunological methods
Experimental Cell Research, 1981Abstract Antiserum to a major phosphorylated nucleolar protein. C23 (MW 103000, pI 5.2) from Novikoff hepatoma was produced in rabbits. By immunodiffusion analysis, the antiserum produced precipitin bands and with various crude extracts of nucleoli, but not with extranucleolar or cytosol fractions.
M O, Olson, K, Guetzow, H, Busch
openaire +2 more sources
Synthesis and Structural Revision of Symbiodinolide C23−C34 Fragment
The Journal of Organic Chemistry, 2009Stereoselective synthesis of the C23-C34 fragment of symbiodinolide, which possesses the originally proposed stereochemistry, and its diastereomers was achieved in 19 steps from L-aspartic acid, respectively. Comparison of spectroscopic data of the synthetic products with those of the degraded product of symbiodinolide led to a structural revision of ...
Takeshi, Murata +4 more
openaire +2 more sources
Synthesis of the C1−C23 Fragment of Spirastrellolide A
Organic Letters, 2008Synthesis of the C1-C23 fragment in spirastrellolide A is described, featuring a cyclic acetal-tethered RCM for stereoselective constructions of spiroketal, and a 1,3- anti aldol involving methyl ketone enolate and Mukaiyama conditions.
Jin-Haek, Yang +2 more
openaire +2 more sources
Association of protein C23 with rapidly labeled nucleolar RNA
Biochemistry, 1986The association of nucleolar phosphoprotein C23 with preribosomal ribonucleoprotein (RNP) particles was examined in Novikoff hepatoma nucleoli. RNA was labeled with [3H]uridine for various times in cell suspensions, and RNP particles were extracted from isolated nucleoli and fractionated by sucrose gradient ultracentrifugation.
A H, Herrera, M O, Olson
openaire +2 more sources
Localization of nucleolar phosphoproteins B23 and C23 during mitosis
Experimental Cell Research, 1983Nucleolar phosphoproteins B23 and C23 were simultaneously localized in unsynchronized male rat-kangaroo PtK2 cells during mitosis using a mouse monoclonal antibody against protein B23 and a rabbit antibody against protein C23. The distribution of proteins B23 and C23 during mitosis was compared with the distribution of the silver staining protein ...
R, Ochs +3 more
openaire +2 more sources
Chemoenzymatic Synthesis of the C10−C23 Segment of Dictyostatin
Organic Letters, 2006[reaction: see text] Employing enzymatic desymmetrization and resolution, respectively, the two aldehydes 8 and 20 were prepared. The precursor to aldehyde 8, meso-2,4-dimethylglutaric anhydride 3, could be obtained by base treatment of the diastereomeric mixture. Aldehyde 8 was extended to alkyne 10 by a Marshall reaction introducing four carbon atoms.
Evgeny, Prusov +2 more
openaire +2 more sources
Synthesis of the C23–C32 fragment of spirangien
Tetrahedron Letters, 2007Abstract The synthesis of the C23–C32 fragment of spirangien A is reported using Evans’ alkylation, Evans–Metternich aldol reaction and a substrate controlled stereoselective reduction.
Michael Lorenz, Markus Kalesse
openaire +1 more source