SUMMARY: Glucose and certain other sugars accelerated hydrogen sulphide production from -cysteine by washed cells of (strain Crookes) which had been grown in the presence of -cysteine. On the other hand, glucose or some other sugars in protein hydrolysate media containing -cysteine suppressed the synthesis of an enzyme(s) which mediates the formation of hydrogen sulphide from -cysteine. Glucose accelerated sulphide formation from -cysteine by sonicated preinduced cells, although activity was unstable to such treatment. Both effects of glucose were influenced by the amino acid content of the medium. Sulphide production probably resulted through the action of cysteine desulphydrase; certain evidence suggested that a transaminase linked to β-mercaptopyruvate desulphurase also may have functioned. Apparently glucose repressed the induction of one or more enzymes concerned with cysteine degradation.


Article metrics loading...

Loading full text...

Full text loading...


Most cited this month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error