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Yeast and Rat Coq3 and Escherichia coli UbiG Polypeptides Catalyze Both O-Methyltransferase Steps in Coenzyme Q Biosynthesis*
Ubiquinone (coenzyme Q or Q) is a lipid that functions in the electron transport chain in the inner mitochondrial membrane of eukaryotes and the plasma membrane of prokaryotes. Q-deficient mutants ofExpand
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Identification of a new gene required for the biosynthesis of rhodoquinone in Rhodospirillum rubrum.
Rhodoquinone (RQ) is a required cofactor for anaerobic respiration in Rhodospirillum rubrum, and it is also found in several helminth parasites that utilize a fumarate reductase pathway. RQ is anExpand
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Microbial eukaryotes have adapted to hypoxia by horizontal acquisitions of a gene involved in rhodoquinone biosynthesis
Under hypoxic conditions, some organisms use an electron transport chain consisting of only complex I and II (CII) to generate the proton gradient essential for ATP production. In these cases, CIIExpand
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Yeast Coq5 C-Methyltransferase Is Required for Stability of Other Polypeptides Involved in Coenzyme Q Biosynthesis*
Coenzyme Q (Q) functions in the electron transport chain of both prokaryotes and eukaryotes. The biosynthesis of Q requires a number of steps involving at least eight Coq polypeptides. Coq5p isExpand
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Evidence that ubiquinone is a required intermediate for rhodoquinone biosynthesis in Rhodospirillum rubrum.
Rhodoquinone (RQ) is an important cofactor used in the anaerobic energy metabolism of Rhodospirillum rubrum. RQ is structurally similar to ubiquinone (coenzyme Q or Q), a polyprenylated benzoquinoneExpand
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Coq3 and Coq4 Define a Polypeptide Complex in Yeast Mitochondria for the Biosynthesis of Coenzyme Q*
Coenzyme Q (Q) is a redox active lipid essential for aerobic respiration in eukaryotes. In Saccharomyces cerevisiae at least eight mitochondrial polypeptides, designated Coq1–Coq8, are required for QExpand
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A conserved START domain coenzyme Q-binding polypeptide is required for efficient Q biosynthesis, respiratory electron transport, and antioxidant function in Saccharomyces cerevisiae.
Coenzyme Qn (ubiquinone or Qn) is a redox active lipid composed of a fully substituted benzoquinone ring and a polyisoprenoid tail of n isoprene units. Saccharomyces cerevisiae coq1-coq9 mutants haveExpand
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Recent advances in silicon etching for MEMS using the ASE™ process
Abstract In the ongoing enhancement of MEMS applications, the STS Advanced Silicon Etch, ASE™, process satisfies the demanding requirements of the industry. Typically, highly anisotropic, high aspectExpand
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The Benefits of Process Parameter Ramping During The Plasma Etching of High Aspect Ratio Silicon Structures
In the ongoing enhancement of MEMS applications, the STS Advanced Silicon Etch, (ASE TM ). process satisfies the demanding requirements of the industry. Typically, highly anisotropic. high aspectExpand
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Alternative splicing of COQ-2 determines the choice between ubiquinone and rhodoquinone biosynthesis in helminths
Parasitic helminths use two benzoquinones as electron carriers in the electron transport chain. In aerobic environments they use ubiquinone (UQ) but in anaerobic environments inside the host, theyExpand
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