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Lutz Schwettmann, Siw Berbu
BACKGROUND: Deficiencies of folate and vitamin B12 lead to an elevated serum concentration of homocysteine which has been associated with many diseases including cardiovascular disease. Laboratory algorithms often include initial testing of serum folate and vitamin B12. Reference intervals for these vitamins can vary significantly among populations for which dietary intakes may be different. The aim of this study was to establish reference intervals in a Norwegian population and to assess the folate and vitamin B12 status related to reference intervals...
2015: Clinical Laboratory
Peik Haugen, Johan F De Jonckheere, Steinar Johansen
The two group I introns Nae.L1926 and Nmo.L2563, found at two different sites in nuclear LSU rRNA genes of Naegleria amoebo-flagellates, have been characterized in vitro. Their structural organization is related to that of the mobile Physarum intron Ppo.L1925 (PpLSU3) with ORFs extending the L1-loop of a typical group IC1 ribozyme. Nae.L1926, Nmo.L2563 and Ppo.L1925 RNAs all self-splice in vitro, generating ligated exons and full-length intron circles as well as internal processed excised intron RNAs. Formation of full-length intron circles is found to be a general feature in RNA processing of ORF-containing nuclear group I introns...
March 2002: European Journal of Biochemistry
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