growth curve studies of the n1e-115 cells indicated that the quantity of methionine5-enkephalin immunoreactive material synthesized per milligram of cellular protein and the maximum number of enkephalin receptor sites per milligram of membrane protein increased as the cells progressed from logarithmic to stationary phase , with no change in the apparent affinity of the enkephalin receptors for [ 3h ] methionine5-enkephalin .
C0007595
growth
C0007634
cells