membrane lipid
proteins
A chain of amino acids that are linked together end to end can only be found in the organic compound of protein. The multiple amino acids are linked together by peptide bonds which are formed by a biochemical reaction.
Proteins are polymers formed from amino acids found in the human body. These amino acids are linked together in a specific sequence to form a protein molecule.
Proteins are made up of amino acids, which are connected together in a specific sequence to form a polypeptide chain. There are 20 different types of amino acids that can be found in proteins, each with their own unique side chain. The sequence of amino acids in a protein determines its structure and function.
Proteins, large and complex biomolecules, are made of amino acids. The amino acids react together to form longer chains called polypeptides. The so-called primary structure of a protein is determined by the specific amino acid sequence unique to every protein, whereas its secondary structure depends on how the polypeptide chain is coiled. The tertiary structure of a protein is finally how the protein looks in 3D. And if several polypeptides interact, forming an even bigger structure, then the protein is said to have a quaternary structure. There are essential and non-essential amino acids. The non-essential ones are made in the body, whereas the essential amino acids must be found in the diet.
Amino acids are linked together to form proteins at the ribosomes, which are the organelles responsible for protein synthesis. Ribosomes can be found either free-floating in the cytoplasm or attached to the endoplasmic reticulum (rough ER). During translation, messenger RNA (mRNA) is read by ribosomes, and transfer RNA (tRNA) brings the corresponding amino acids to be assembled into a polypeptide chain. This process continues until a complete protein is formed.
The side chain, or R-group, is the component that differs among amino acids found in proteins. It is this side chain that confers unique chemical properties to each amino acid, impacting protein structure and function.
The ribosomes of the cell are responsible for joining the amino acids together during protein synthesis. The ribosomes can be found attached to the rough endoplasmic reticulum or floating free in the cytoplasm. Amino acids are joined together by peptide bonds to form proteins, and the type of proteins synthesized by a cell is dictated by the DNA.
The building blocks of proteins are amino acids. There are 20 standard amino acids that can be found in proteins, each with a unique side chain that determines its properties and functions. Proteins are made by linking amino acids together in a specific sequence.
Peptides are nutrients that are made from two or more amino acids linked together. They are essential for the body's functions, including building and repairing tissues, and are found in many types of foods, including meat, dairy, and legumes.
Proteins are composed of monomers called amino acids. There are 20 different amino acids commonly found in proteins, each with a unique side chain. These amino acids are joined together through peptide bonds to form the primary structure of a protein.
A backbone molecule is the unchanging part of a molecule, which are linked together in a chain-like fashon. For example: An amino acid molecule consists of an amino group (usually featured on the left hand side), and a carboxyl group (usually featured on the right hand side) bound to a central (alpha) carbon atom. That is the basic (non-changing) part of the amino acid. However, to the central (alpha) carbon there is a Hydrogen atom, and a side chain (or function group) are attached (bound). That side chain is different for every amino acid, thus giving a unique property to each and every one of them. These amino acid molecules are linked together by peptide bonds, leading to the formation of a protein molecule. Since the the basic molecule parts (amino group, alpha carbon, carboxyl group) are linked to each other, forming a chain, that is what is considered as the "protein backbone". Similarly, other molecules can form a "backbone" . Other examples are: sugar-phosphate backbone in DNA, carbohydrate backbones in polysaccharide. More info can be found under related links