1887

Abstract

RI fragments of DNA from NCIB 8565, a high producer of an endo-1,3-1,4---glucanase, were ‘shot-gun’ cloned in the plasmid vector pBR325. A 3·5 kb insert, carrying single restriction sites for I, II, I, I and II, was shown to direct the synthesis of -glucanase in K12. Enzyme activity was demonstrated in extracellular fractions of harbouring the -glucanase gene; however, the largest proportion (< 50%) of total enzyme activity was periplasmic in location. -Glucanase activity and cellular location were independent of the orientation of the 3·5 kb fragment in pBR325.

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1984-05-01
2021-07-30
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