How do membranes vary between different organisms?

TL;DR - the most prominent differences are in the lipid composition, but both membrane structure and protein content are reasonably distinct. Apologies if I over-explain this, but some fundamentals need to be gone through before this can be satisf... read more

These can all vary between different organisms. For example, IMPs in unicellular organisms are more likely to have between 6 and 12 transmembrane segments, whereas in multicellular organisms 7 transmembrane segments is more common [7]. read more

Unlike bacteria, archaea are able to live in extreme environments, some produce methane, their plasmid membranes are unique compared to other lifeforms and their cell walls lack peptidoglycan, which is present in bacteria cell walls. read more

Hydrophobic side contain nonpolar amino acids, hydrophilic are exposed to aqueous solutions on both sides of the membrane, some proteins allow path of substances including water. Peripheral prteins aren't in the bilayer, loosely at the surface of the membrane, exposed to integral proteins. read more