The fluid mosaic model

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The fluid mosaic model
The phospholipids form 75% of the cell surface membrane. This is about 7nm thick.
Singer and Nicholson proposed their `fluid mosaic' theory in 1972 to describe the structure
of the cell membrane. It's called a fluid mosaic model because:
1. The molecules move or sway within their respective layers.
2. Protein molecules (and cholesterol) are dotted randomly within the 75%
phospholipid bilayer.
Intrinsic proteins: completely span the membrane.
Extrinsic proteins: are only found on the inner and outer surface of the membrane.

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C=C
acids
length of fatty acid
longer fatty acid tails shorter fatty acid tails
tails
number of steroid
more cholesterol less cholesterol
(cholesterol
molecules molecules
molecules)
temperature cooler temperatures hotter temperatures…read more

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