Transmembrane proteins are found in the plasma membrane. Hydrophilic regions are embedded
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within the membrane, and Hydrophobic regions project from both surfaces of the bilayer.
</span><span> Approximately 20-80% of the cell membrane is composed of lipids, the rest, is made up of protein. The lipid layer of the membrane gives it flexible and permeable characteristic. While the protein part assists in transport of molecules it needs to survive.<span> </span></span>
A hydrogen bond is a form of the electrostatic force of attraction which takes place between the hydrogen atom and a more electronegative atom such as nitrogen, fluorine, and oxygen.
Hydrogen bond falls in the category of weak forces.
In size-exclusion chromatography, the type of interaction that takes place between the proteins and dextran is hydrogen bonding.
The hydrogen bonding is possible because dextran, being a polysaccharide of glucose has several hydroxyl groups and thus, they get involved in the hydrogen bonding.
