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chapter 7 Cellular Structure and Function What else is found in the plasma membrane? Cholesterol, proteins, and carbohydrates move among the phospholipids in the plasma membrane Proteins are found on both the inner surface and the outer surface of the plasma membrane Proteins on the outer surface are called receptors because they send signals to the inside of the cell
5. 1|Components and Structure 5 - theexpertta. com A plasma membrane's principal components are lipids (phospholipids and cholesterol), proteins, and carbohydrates attached to some of the lipids and proteins A phospholipid is a molecule consisting of glycerol, two fatty acids, and a phosphate-linked head group Cholesterol, another lipid comprised of four fused carbon rings, is situated alongside the phospholipids in the membrane's core The
Intracellular Cholesterol Transport by Sterol Transfer . . . Cholesterol is dynamically transported among membrane-bound organelles primarily by nonvesicular mechanisms Sterol transfer proteins (STPs) bind cholesterol in their hydrophobic pockets and facilitate its transfer across the aqueous cytosol However, STPs alone may not account for the specific and ef cient movement of cholesterol between intracellular membranes Accumu-
Fatty acid–binding proteins 3, 7, and 8 bind cholesterol and . . . Cholesterol from low-density lipoprotein (LDL) can be transported to many organelle membranes by non-vesicular mechanisms involving sterol transfer proteins (STPs) Fatty acid–binding protein (FABP) 7 was identified in our previous study searching for new regulators of intracellular cholesterol trafficking Whether FABP7 is a bona fide STP remains unknown Here, we found that FABP7
MEMBRANE LIPID DYNAMICS DURING HUMAN SPERM CAPACITATION During the transit of sperm through the female reproductive tract, which contains high concentrations of glycosaminoglycans, coating proteins previously bound to sperm surface are trapped by heparin-like glycosaminoglycans: removal of proteins occurs in a time-dependent manner and this is considered to constitute the first step towards