One of many new insights emerged in genomic science through the Human Genome Project is that human DNA are only one of many different types of the famous genetic code. This is the knowledge which enables genomic research to rapidly progress beyond mapping humans, towards the goal of understanding a human being.
Nerve fiber and collagen
Nerve fibers are made of the protein neurofilament. Collagen is the most abundant protein in mammals. It is found in connective tissues, such as skin, ligaments, and tendons.
Nerve fiber is a type of fibrous protein. Other types of fibrous proteins include collagen and keratin.
Collagenous fibers are found in dense regular connective tissue and dense irregular connective tissue. The collagenous fibers contain the protein collagen, which give the fiber great tensile strength. These fibers are strong, but they are also flexible. They can stretch to a certain extent, but do not break easily.
Nerve fibers are long thin cells of the nervous system which carry signals from one part of the body to another. Nerve fibers are cells of the nervous system that carry signals from one part of the body to another.
Collagen and albumin
Collagen and albumin are both globular proteins, as opposed to fibrous proteins like silk and keratin. Albumin is a soluble protein that can be found in animal blood plasma.
It is the most abundant protein in the bloodstream, and it helps regulate osmotic pressure (the amount of water retained by cells) in the body. Its structure contains a single polypeptide chain which forms a globular shape.
Collagen is the most abundant protein in mammals, making up about 30% of the overall body mass. It can be found all over the body in skin, tendons, bones, ligaments, and fascia (the connective tissue that surrounds muscles), among other places. It’s made of three polypeptide chains twisted around each other like a rope.
Albumin and casein
Albumin is the most common protein in human blood plasma. It plays a pivotal role in stabilizing extracellular fluid volume by contributing to oncotic pressure (the osmotic pressure that occurs due to proteins) of plasma.
Albumins are also commonly used as a component of growth media for cell culture. When used this way, the albumin provides some of the amino acids and other nutrients required for cell survival and growth.
Casein is the name for a family of related phosphoproteins (αS1, αS2, β, γ). These proteins are commonly found in mammalian milk, constituting 80% of the proteins in cow milk and between 60% and 65% of the proteins in human milk.
Casein has a wide variety of uses, from being a major component of cheese, to use as a food additive. As a food source, casein supplies amino acids, carbohydrates and two essential elements, calcium and phosphorus.
Proteins are made up of amino acids strung together like beads on a necklace. There are 20 different amino acids, which can be linked together in almost any combination. The sequence determines each protein’s unique 3-dimensional shape and its specific function within the cell or organism
Nerve fiber and albumin
Proteins are large, complex molecules made-up of amino acids and are vital to the structure and function of all living organisms. Proteins range in size from 50 to 2,000 amino acids, and each protein has a unique 3-dimensional shape that is determined by the sequence of its constituent amino acids. Proteins can be grouped into four categories:
Enzymes are proteins involved in catalysis, or the acceleration of chemical reactions. Enzymes are highly specific and often require a cofactor (such as a metal or vitamin) to act correctly.
Contractile proteins give cells the ability to move (e.g., contractile proteins in muscle cells). Actin and myosin are examples of contractile proteins.
Structural proteins provide structural support for cells (e.g., collagen) or within cells (e.g., tubulin, which is found in microtubules).
Signaling molecules are used by cells to communicate with one another. Some signaling molecules, such as growth factors, have enzymatic activity; others do not.
Nerve fiber and casein
Proteins that are used as structural components of cells are called fibrous proteins. Such proteins are made up of long, straight chains of amino acids that form twisted, rope-like structures
The most common fibrous protein is collagen (KOL-uh-jehn). Collagen is a fibrous protein found abundantly in animals and humans. It makes up the connective tissue in skin and other organs of the body. In animals, collagen makes up hide, bone, tendons and cartilage. In humans, collagen makes up about two-thirds of your skeletal mass.
With few exceptions, all vertebrates have connective tissue containing collagen. The difference between human skin and animal hide lies in the presence of keratin (KER-uh-tin), another type of protein. Keratin forms a protective layer over the skin that gives it a tougher exterior than human skin has. An example of an exception to this rule is the monotreme mammals, such as the duck-billed platypus and spiny anteater. These mammals do not have keratin but instead have a layer of fur over their bodies.
Last Words
The answer: all are correctly associated. While the association of each type of protein with its respective group is correct, individual amino acids can be classified as belonging to one or more groups. For example, leucine belongs to all three branched chain amino acid groups (leucine, isoleucine and valine).