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  • Title: Cloning and sequence analysis of the hemB gene of Rhodothermus marinus.
    Author: Gudmundsdóttir K, Sigurdsson E, Thorbjarnardóttir SI, Eggertsson G.
    Journal: Curr Microbiol; 1999 Aug; 39(2):103-5. PubMed ID: 10398836.
    Abstract:
    A Rhodothermus marinus gene, hemB, coding for 5-aminolevulinic acid (ALA) dehydratase (ALAD) has been cloned and sequenced. The reading frame of the hemB gene is 1020 base pairs encoding a protein of 340 amino acids with a calculated molecular mass of 37.4 kDa. The amino acid sequence shows homology with eubacterial and eukaryotic ALA dehydratases. A putative metal-binding site of the protein shows strongest homology with corresponding sites from plant ALA dehydratases that require Mg2+ for activity. It differs with respect to only one amino acid out of 20 from a corresponding site in pea ALAD.
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