growth of the cells in media containing uracil , compared to growth in media without uracil , resulted in a four- to fivefold decrease in the concentrations of aspartate transcar-bamylase and dihydroorotase and a twofold increase in the concentration of arginine deiminase , as estimated from specific enzyme activity in crude extracts of the cells .
C0007595
growth of
C0007634
cells