Different types of peanuts. Not every peanut is the same! There are thousands of different types of peanuts, these are known as different cultivars. We can distinguish four popular different types of peanuts: the Runner peanut, the Virginia peanut, the Valencia peanut and the Spanish peanut. All these peanuts differ in size, color, flavor and oil content and are often used for very different purposes.
For a signal molecule to bind with an intracellular receptor it must be able to pass through the cellular membrane. Generally signal molecules that enter the cell are nonpolar and fat soluble. These signal molecules can pass through the lipid bilayer of the cell membrane.
Receptor: Receptor, molecule, generally a protein, that receives signals for a cell. Small molecules, such as hormones outside the cell or second messengers inside the cell, bind tightly and specifically to their receptors. Binding is a critical element in effecting a cellular response to a signal and is