| rRNA | ribosomal ribonucleic acid |
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| SSU rRNA | Small-subunit rRNA |
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| 16S rDNA | 16S rRNA |
| 16S rDNA | 16S rRNA gene |
| rRNA | Ribosomal RNA |
| SSU rRNA | Small subunit ribosomal RNA |
| rrna operon | Genetic loci which direct transcription and translation of ribosomal RNA in bacterial operons. They are designated rrnb, rrnc, rrnd, etc. According to the structural position of the transcription unit in the DNA sequence. (12 Dec 1998) |
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| ara operon | <biochemistry, molecular biology> Operons involved in arabinose metabolism, especially. The araBAD operon of E. Coli.Two other ara operons are known in E. Coli. (18 Nov 1997) |
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| m(2)G rRNA methyltransferase | <enzyme> 16s rrna-specific methyltransferase; forms m(2)g966; uses unmethylated 30s subunits as a substrate, but not free unmethylated 16s rrna Registry number: EC 2.1.1.- Synonym: m2g methyltransferase, m(2)g methyltransferase (26 Jun 1999) |
| m(5)C rRNA methyltransferase | <enzyme> 16s rrna-specific methyltransferase; forms m(5)c967; uses free rrna but not 30s subunits as substrate Registry number: EC 2.1.1.- Synonym: m5c methyltransferase, m(5)c methyltransferase (26 Jun 1999) |
| rRNA | <molecular biology> A nucleic acid found in all living cells. Plays a role in transferring information from DNA to the protein-forming system of the cell. (16 Dec 1997) |
| rRNA (adenosine-O-2'-)methyltransferase | <enzyme> Forms 2'-o-methyladenosine; ermd protein methylates a specific residue on 23s rrna to confer macrolide-lincosamide-streptogramin b resistance; emre specifically modifies 23s rrna by n6,n6-dimethylation of a2058; has been sequenced; genbank x82668 (emrc) Registry number: EC 2.1.1.66 Synonym: rrna(adenine-2-)methyltransferase, ribosomal RNA methylase, rrna methylase, ermd gene product, ermc' gene product, 23s ribosomal RNA a1067 2'-methyltransferase, 23s rrna methylase, ermsf methyltransferase, tlra methyltransferase, thiostrepton-resistance methylase, thiostrepton-resistance-encoding gene product, tsnr gene product, erme methyltransferase, 23s ribosomal RNA a2058 methyltransferase, ermc methyltransferase, ermam methyltransferase (26 Jun 1999) |
| his operon | <molecular biology> An operon which governs the synthesis of the amino acid histidine out of ATP and phosphoribosyl pyrophosphate. The his operon was first observed in and described for the bacteria Salmonella typhinurium. (09 Oct 1997) |
| operon | <molecular biology> Groups of bacterial genes with a common promotor, that are controlled as a unit and produce mRNA as a single piece, polycistronic messenger. An operon consists of two or more structural genes, which usually code for proteins with related metabolic functions and associated control elements that regulate the transcription of the structural genes. The first described example was the lac operon. (18 Nov 1997) |
| 18S rRNA dimethylase | <enzyme> A member of the erm family of dimethylases; 27% identical to ksga protein; from saccharomyces cerevisiae; genbank l26480 Registry number: EC 2.1.1.- Synonym: dim1 protein, dim1 gene product (26 Jun 1999) |
| Lac operon | Group of adjacent and coordinately controlled genes concerned with the metabolism of lactose in E. Coli. The lac operon was the first example of a group of genes under the control of an operator region to which a lactose repressor binds. When the bacteria are transferred to lactose containing medium, allolactose (which forms by transglycosylation when lactose is present in the cell) binds to the repressor, inhibits the binding of the repressor to the operator and allows transcription of mRNA for enzymes involved in galactose metabolism and transport across the membrane (_ galactosidase, galactoside permease and thiogalactoside transacetylase). (18 Nov 1997) |
| lactose operon | Group of adjacent and coordinately controlled genes concerned with the metabolism of lactose in E. Coli. The lac operon was the first example of a group of genes under the control of an operator region to which a lactose repressor binds. When the bacteria are transferred to lactose containing medium, allolactose (which forms by transglycosylation when lactose is present in the cell) binds to the repressor, inhibits the binding of the repressor to the operator and allows transcription of mRNA for enzymes involved in galactose metabolism and transport across the membrane (_ galactosidase, galactoside permease and thiogalactoside transacetylase). (18 Nov 1997) |
Synonyms : rrnB Operon, Operon, rrnB, Operons, rRNA, Operons, rrnB, rRNA Operons, rrnB Operons
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