TABLE 1.

Levels of ER-specific, Golgi apparatus-specific, and plasma membrane-specific marker enzymes in washed LB preparations

FractionConcn of:
CCRa (μkat/mg protein)IDPase (nkat/mg protein)ATPase (nkat/mg protein)
Endomembrane fraction10.976.910.4
LBs0.043Below detection limitBelow detection limit
  • a CCR, cytochrome c reductase; IDPase, inosine diphosphatase.