Chemical Structure For Lipids | 6 Important Points

Chemical Structure For Lipids | 6 Important Points

Chemical Structures of Lipids and Their Properties


Introduction: The word lipid comes from two Latin words: “lipo,” meaning fat, and “acid,” meaning acid. The first lipid discovered was cholesterol, which is present in almost every cell in the body. Lipids are a significant component of human tissues and serve many functions in our bodies. They can be found in membranes surrounding our cells and perform several roles in maintaining homeostasis.

Our brains comprise around 60% lipids and play an essential role in nerve conduction, neurotransmitter activity, and other vital functions. Lipids are crucial to the development of the fetus, and they are necessary for the maintenance of healthy bones. They also form the basis of the blood.



1. The Lipid Structure


Do you know what the structure of the lipid is? And do you know what role it plays in the body? Let me tell you that lipids are an essential compound in the human body and are the cell membrane’s main components.

Lipids are composed of fatty acid, a chemical produced from the oxidation of carbohydrates. Fatty acids are the main component of triglycerides. They are formed when glycerol and three fatty acids combine.

In the body, lipids perform several functions:

  1. They play an essential role in keeping the body’s organs intact.
  2. They act as fuel for the cells.
  3. They also act as building blocks for membranes.
  4. They protect the body against harmful substances.


A lipid molecule is a chain of carbon atoms connected. There are two kinds of lipids, saturated and unsaturated. Saturated lipids contain equal amounts of hydrogen and carbon atoms, while unsaturated lipids contain more carbon than hydrogen atoms.

There are four essential lipids groups: triglycerides, diglycerides, phospholipids, and sphingolipids.

Triglycerides are the most common lipids composed of three fatty acids linked to glycerol. They are the primary form of energy stored in the body.

Triglycerides are found in high adipose tissue (fat) levels and in the liver. They also have a significant role in the digestive system.

Diglycerides are similar to triglycerides, but they have one fewer carbon atom. Diglycerides are more common in the brain.

Phospholipids are the most complex of all lipids. They are composed of phosphoric acid and one or two other fatty acids. Phospholipids are the basis of cell membranes and are also found in the nervous system, muscles, and heart.

Sphingolipids are the most complex of all lipids. They are found in the brain, spinal cord, and kidney.


This is the complete information about the lipid structure. I hope you understood the concept and can now share your opinions with me in the comment section.


2. The Phospholipid Structure


Have you ever thought about what phospholipid means? Well, I will tell you what it means and how it affects your body. Let’s start with the explanation.

A phospholipid is an organic compound. It consists of phosphate, hydrophobic groups, and a head. The head contains the hydrophilic group, and the rest of the structure is hydrophobic. The system is a fatty acid chain with a leader. It is formed by combining a fatty acid and glycerin.

A combination of fatty acid and glycerin forms a phospholipid. The phospholipids are used to make the cell membrane of your body. They are made of a heavy acid chain and a head. The heads contain the hydrophilic groups, and the rest of the structure is hydrophobic.

Here are some common names of phospholipids:

Lysophosphatidylcholine (LPC)

Phosphatidylcholine (PC)

Phosphatidylethanolamine (PE)

Lysophosphatidylserine (LPS)

Lysophosphatidic acid (LPA)

Lysophosphatidylinositol (LPI)

Phosphatidylinositol (PI)

Phosphatidylglycerol (PG)

Phosphatidylserine (PS)

Phosphatidylinositol 3-phosphate (PIP3)

Phosphatidylinositol 4,5-bisphosphate (PIP2)

Phosphatidylinositol 1,4,5-trisphosphate (PIP3)

Lysophosphatidic acid (LPA)

Dietary sources of Phospholipids:

The primary sources of phospholipids are vegetable and animal fats. Soybean oil, egg yolk, and milk are good sources of phospholipids.


These are the common phospholipids that affect your body. They are present in almost all foods. They are essential for the body and play a vital role in our body. You will be surprised to know that it is one of the most common ingredients in the


3. The Glycerophospholipid Structure

Glycerophospholipids are compounds that play a vital role in the human body. They are the essential component of the cell membrane and are present in the nervous system. In this paper, I will communicate with you an outline of glycerophospholipids.

Glycerophospholipids are compounds that are made up of glycerol and phosphoric acid. There are three types of glycerophospholipids: diacylglycerol, monoacylglycerol, and lysophospholipid.

Types of glycerophospholipids:

1. Diacylglycerol

Diacylglycerol is also known as the two fatty acids esterified with glycerol. It is mainly found in animals.

2. Monoacylglycerol

Monoacylglycerol is a compound that consists of a single fatty acid esterified with glycerol. It is mainly found in plants.

3. Lyso-Phospholipid

Lyso-phospholipids are molecules that consist of glycerol and phosphoric acid. It is the product of the hydrolysis of phospholipids.

Glycerophospholipids: Functions in the body

Glycerophospholipids are the essential components of the cell membrane. They play a vital role in the body’s growth, differentiation, and metabolism. It is a phospholipid with a polar head and a nonpolar tail.

Functions of glycerophospholipids in the body:

1. Growth

Glycerophospholipids are the main component of the cell membranes. They are present in the form of a bilayer. When the cell divides, it increases the number of glycerophospholipids in the cell.

2. Differentiation

It is the most crucial function of glycerophospholipids in the body. They are the major component of the nerve sheath and myelin.

3. Metabolism

It is also the major component of the mitochondrial membrane and the endoplasmic reticulum. It takes part in the breakdown of fat.


In this article, I have communicated with you an outline of glycerophospholipids. I have also shared with you the functions of glycerophospholipids in the body.

Chemical Structure For Lipids | 6 Important Points

4. The Ether Lipid Structure


Ether lipids are fat-like molecules made up of hydrocarbon chains and a group called ethers. These lipids are similar to fats but have a particular structure.

These molecules are primarily used in the production of medicines and vaccines.

What is an ether lipid?

An ether lipid is a compound that contains oxygen in its chemical composition.

These are different from the usual lipids, which contain carbon. The oxygen atoms are attached to the carbon atoms, similar to alcohols.

Why are ether lipids essential?

The primary use of ether lipids is to produce vaccines.

How are ether lipids produced?

Ether lipids are usually produced using alcohols and fatty acids in a reaction called esterification.

These reactions create a product called esters, also known as triglycerides.

Esterification is a chemical response in which a hydrogen atom replaces the oxygen atom in an organic molecule.

These products are called esters, also used as food additives.

The esterification process involves reacting alcohols with fatty acids in the presence of a catalyst.

For example, in producing a vaccine, the vaccine maker will combine alcohol and fatty acid to form an ester.


If you are looking for the Ether Lipid Structure, then I hope you will get the


5. The Sterol Lipid Structure

Sterols are an essential component of the human body that helps us to maintain our overall health and beauty. The term “sterols” means “structure,” They are lipid molecules consisting of a hydrophilic head group and a hydrophobic tail group.

They are found in almost all living organisms, including animals, plants, and microorganisms. They are classified into four main groups based on their structure and function.

Here are the four major groups of sterols:

1. Cholesterol (C 27H 45NO 2)

2. Beta-sitosterol (C 30 H 45 O 2 )

3. Campesterol (C 30 H 45 O 3 )

4. Stigmasterol (C 30 H 45 O 4 )

All the sterols contain the same functional groups (OH, CH2, and C=O) as cholesterol. But the difference is in the length of the aliphatic chain.

The longer the chain is, the higher the melting point. As the temperature increases, the number of bonds increases, and the size of the molecule increases, resulting in a stronger attraction between the molecules.

These molecules are primarily found in plants and algae. Some edible plants like wheat germ, almonds, and rice bran are rich sources of sterols.

In a study, the researchers discovered that consuming soybeans was associated with a lower risk of colon cancer. They found that soybean’s beta-sitosterol could be responsible for its anticancer properties.


Sterols are the most critical component of the human body and are vital for maintaining the health of our body. They are also present in all living organisms.


Characteristics Of Lipids | 5 Important Points

6. The Triacylglycerol Lipid Structure


Triacylglycerol is fat used by the body as energy and stored in the adipose tissue. The fat which is stored in the body is called adipose tissue. There are two types of triacylglycerol, saturated and unsaturated. These fats are present in food as well as in the body. Triacylglycerol is present in meat, fish, egg, dairy products, nuts, and seeds.

A triacylglycerol is an esterified form of glycerol and fatty acids. Glycerol is a molecule that is made up of three molecules of glycerin. Fatty acids are formed when the body breaks down food and use it for energy.

The Triacylglycerol structure is very similar to phospholipids, but they have a different arrangement of the carbon chain.

Triacylglycerol has the following structure:


Where A represents the glycerol moiety, B is the acyl group, C is the fatty acid moiety, D is the hydrophilic head group, and E is the hydroxyl group.

Triacylglycerol is a mixture of triglycerides, and the mixture is known as triacylglycerols. The number of triglycerides can vary in the mixture, which is called the triacylglycerols composition. The type of fatty acid attached to the glycerol backbone can also vary, but palmitic acid and stearic acid are the most common.

There are many different types of triacylglycerols. The main triacylglycerols are triacylglycerol, tripalmitin, tripalmitolein, triolein and tristearin.

The composition of triacylglycerols:

The fatty acids linked to the glycerol spine in triacylglycerols can vary. Triacylglycerols with the same number of fatty acids are called isomers.

The fatty acids are arranged in the following order:

Saturated fatty acids (SFA)

Unsaturated fatty acids (USFA)

Polyunsaturated fatty acids (PUFA)

Monounsaturated fatty acids (MUFA)

Polyunsaturated fatty acids (PUFA)

Saturated fatty acids (SFA)

Saturated fatty acids are present in large quantities and are found in the meat of animals. Saturated fatty acids are found in beef, chicken, pork, and other animal products. They are composed of just one type of fatty acid.




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