Transverse mobility of aminophospholipids in the plasma membrane of ram sperm cells.
The transbilayer movement of aminophospholipids in the plasma membrane of ram sperm cells was investigated using spin-labeled lipid analogues. After incorporation, spinlabeled phosphatidylserine (SL-PS) and phosphatidyl-ethanolamine (SL-PE) rapidly disappeared from the exoplasmic monolayer. Even at lower temperatures (10 degrees C) the inward movement of SL-PE is fast. The initial velocities of the internalization of SL-PS and SL-PE were compared with those of ram and human erythrocytes.
Müller
K
K
Institut für Fortpflanzung landwirtschaftlicher Nutztiere Schonow e.V, Germany.
Pomorski
T
T
Marienfeld
K
K
Herrmann
A
A
Müller
P
P
D000177:Acrosome / Q000502:physiology; D000818:Animals; D002462:Cell Membrane / Q000378:metabolism / Q000648:ultrastructure; D006801:Humans; D066298:In Vitro Techniques; D008297:Male; D008561:Membrane Fusion / Q000502:physiology; D010714:Phosphatidylethanolamines / Q000378:metabolism; D010718:Phosphatidylserines / Q000378:metabolism; D010743:Phospholipids / Q000378:metabolism*; D012756:Sheep; D013094:Spermatozoa / Q000378:metabolism* / Q000648:ultrastructure; D013696:Temperature; D014817:Vitelline Membrane / Q000502:physiology
D010714:Phosphatidylethanolamines; D010718:Phosphatidylserines; D010743:Phospholipids