Protein Functions in the Body

Study Notes

Proteins provide structure to skin, bone, hair, and nails through collagen and keratin.
Enzymes, a type of protein, catalyze virtually all reactions in living systems.
Muscles are composed of proteins called myosin and actin, enabling movement.
Hemoglobin, a protein, transports oxygen from the lungs to cells, while other proteins transport molecules across cell membranes.
Many hormones, such as insulin, oxytocin, and human growth hormone, are proteins.
The protein fibrinogen is involved in blood clotting, and antibodies, another type of protein, fight disease.
Proteins like casein in milk and ovalbumin in eggs store nutrients for newborn infants and birds.
Ferritin, a liver protein, stores iron.
Certain proteins regulate gene expression and control when it takes place.

An amino acid is a compound containing both an amino group and a carboxyl group.
In an α-amino acid, the amino group is located on the carbon adjacent to the carboxyl group.

Proteins provide structure to skin, bone, hair, and nails through collagen and keratin.
Enzymes, a type of protein, catalyze virtually all reactions in living systems.
Muscles are composed of proteins called myosin and actin, enabling movement.
Hemoglobin, a protein, transports oxygen from the lungs to cells, while other proteins transport molecules across cell membranes.
Many hormones, such as insulin, oxytocin, and human growth hormone, are proteins.
The protein fibrinogen is involved in blood clotting, and antibodies, another type of protein, fight disease.
Proteins like casein in milk and ovalbumin in eggs store nutrients for newborn infants and birds.
Ferritin, a liver protein, stores iron.
Certain proteins regulate gene expression and control when it takes place.

An amino acid is a compound containing both an amino group and a carboxyl group.
In an α-amino acid, the amino group is located on the carbon adjacent to the carboxyl group.