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| Product Name | β-Galactosidase (E. coli) |
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| Description | Chromatographically purified. Beta-galactosidases are widespread in microorganisms, animals and plants. That from the Escherichia coli strain K12 has been particularly studied at Anfinsen's laboratory in connection with genetic experiments on gene regulation of protein synthesis. Beta-galactosidase is tetrameric, being composed of four identical subunits of 135kD, each with an active site which may be independently active (Melcher and Messe 1973). The enzyme is readily fragmented into small peptides (Marinkovic et al. 1975). The amino acid analysis indicates approximately 1170 residues per subunit (Fowler and Zabin 1970). See also Langley et al. (1975) and Naider et al. (1972). Kaneshiro et al. (1975) report on an active dimer. Contaxis and Reithel (1974) report a small molecule with high 260nm absorbance which is bound to the enzyme in crude extracts as a stabilizer. On adding it to the pure enzyme, activity and heat stability are enhanced. Bronskil and Wong (1971) suggest that the ri |
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| Size | 50ug |
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| Concentration | n/a |
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| Applications | n/a |
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| Other Names | EC=3.2.1.23 |
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| Gene, Accession, CAS # | n/a |
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| Catalog # | G1041-05X |
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| Order / More Info | β-Galactosidase (E. coli) from UNITED STATES BIOLOGICAL |
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| Product Specific References | n/a |
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