Galactose operon

Jordan, E., Saedler, H., and Starlinger, P. (1967). Strong polar mutations in the transferase gene of the galactose operon in E. coli. Molec. Gen. Genet. 100 296-306. 

Kitaoka, M., Tian, I, and Nishimoto, M. 2005. A novel putative galactose operon involving lacto-N-biose phosphorylase found in Bifidobacterium longum. Appl. Environ. Microbiol., 71(6), 3158-3162. 

See also Galactose Operon, Galactose Metabolism, Diastereomers, Saccharides, cAMP Receptor Protein, Monosaccharide Nomenclature... 

See also Lactose Operon Regulation, Transcription Regulation in PhageA., Galactose Operon, trp Operon Regulation... 

See also Lactose operon regulation galactose operon, arabinose operon... 

Other results using a pure transcription system with DNA from an insertion mutant in the galactose operon, were discussed in favor of the termination model of polarity (Crombrugghe et al., 1973). Although the two inserted sequences IS 1 and IS 2 (Hirsch et al., 1972 Fiandt et al., 1972) are equally polar in vivo, termination of transcription was found only with DNA carrying IS 2, not with DNA carrying either IS 1 or a strongly polar nonsense mutation. Possibly termination of transcription is a property peculiar to insertion IS 2. 

Wetekam, W., Staack, K., Ehring, R. DNA-dependent in vitro synthesis of enzymes of the galactose operon of Escherichia coli. Molec. gen. Genet. 112, 14-27 (1971). 

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