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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Production of recombinant keratinase for poultry feather degradation

Alinezhad, Saeid, Mirabdollah, Amir January 2009 (has links)
The keratinase gene (kerA) of Bacillus licheniformis ATCC®53757 was PCR amplified and subsequently cloned into Bacillus megaterium expression vector; pHIS1525.SPlipA and transformed in Bacillus megaterium ATCC®14945. The kerA gene carrying the recombinant plasmid pKERHIS1525.SPlipA was expressed in Bacillus megaterium under xylose inducible promoter, purified using Ni-NTA affinity column chromatography and consequently produced an extracellular keratinase activity of 29 U ml-1 after 18 h of incubation. The recombinant strain was further examined for feather degradation of intact chicken feathers. The chopped chicken feathers were partially degraded by the recombinant strain after 3days and the total macroscopic digestion was ultimately observed after seven days resulting in a yellowish peptide rich fermentation broth.

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