membran sel/ membran plasma - media

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Membran sel/ Membran Plasma Apa itu membrane sel
1 0 /2
lemak berganda).
Terdiri dr lipid (sebagian besar FOSPOLIPID)
dan protein.
diantara 2 lapis protein.
nonliving surroundings
selectively permeable
easily than others
hydrophobic vs hydrophilic
macromolecules
membrane proteins are inserted into the
phospholipid bilayer
It’s like a fluid… It’s like a mosaic… It’s the Fluid Mosaic Model!
z
about as fluid as thick salad oil
% unsaturated fatty acids in phospholipids
keep membrane less viscous
increase % in autumn
cholesterol in membrane
z Membrane Proteins
unique collections of proteins
cell surface identity marker (antigens)
integral proteins
transmembrane protein
transport proteins
2 0
0 7
-2 0
0 8
Why are proteins the perfect molecule to build structures in the cell membrane?
z Classes of amino acids
What do these amino acids have in common?
nonpolar & hydrophobic
What do these amino acids have in common?
polar & hydrophilic
z Proteins domains anchor molecule
Within membrane
Porin monomer
b-pleated sheets
Outside
recognition
cell from another