1887

Abstract

Summary: Of a large number of sugars and polysaccharides, only cellulose substrates or cellobiose induced C (B-,4-glucan glucano hydrolase; Enzyme Commission no. 3.2.1.4) in Many of the sugars tested inhibited the induction of C in the presence of carboxymethyl-cellulose (CM cellulose); this is explained on the basis of a balance between growth and enzyme production such that a low growth rate is usually coupled with high C levels and vice versa. One per cent glucose completely repressed Cinduction in 0·1 % cellobiose medium. Cellobiose caused slight inactivation of C by end-product inhibition. If the mycelium has no physical contact with insoluble cellulose in liquid cultures, virtually no growth occurs and C values are insignificant. These results are discussed in relation to the postulated C enzyme involved in the initial stages of cellulose degradation.

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/content/journal/micro/10.1099/00221287-63-2-163
1970-10-01
2021-08-04
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