Figure 4From: Progesterone modulation of transmembrane helix-helix interactions between the α-subunit of Na/K-ATPase and phospholipid N-methyltransferase in the oocyte plasma membraneThe topology of the α1-subunit of the Na/K-ATPase (left), PE-N-methyltransferase (center), and SM synthase (right) in Scalable Vector graphics (SVG) format [14]. The cross section of each enzyme is shown with the lumenal side uppermost and the intracellular environment at the bottom. The N and C termini of all three proteins are located intracellularly.Back to article page