Lipids and Biomembranes

ID #2390

I'm a little confused with the naming of some types of proteins. Are integral proteins a collective term that contains transmembrane and membrane associated proteins? Transmembrane proteins protrude through both leaflets, correct? Do membrane associated proteins only go through 1 leaflet?

The fluid mosaic model from lecture 9 shows the different membrane-associated proteins: 
(1) Peripheral membrane proteins associate with the membrane without entering a leaflet. 
(2) Integral membrane proteins pass through the hydrophilic and hydrophobic portions of 1 leaflet of the membrane. 
(3) Transmembrane proteins go across both leaflets at least once (but as the drawing shows it could go across both leaflets more than once and create multi-pass channels).

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