the activities of delta-aminolaevulate synthetase and delta-aminolaevulate dehydratase have been assayed in saccharomyces cerevisiae during glucose repression and de-repression . delta-aminolaevulate dehydratase increased concomitantly with the increase in oxygen uptake during the de-repression phase caused by the depletion of glucose in the medium . delta-aminolaevulate synthetase showed an oscillatory behaviour and a spurt in its activity always preceded the increase in oxygen uptake .
C0035143
repression
C0004927
behaviour