The building blocks of protein are amino acids. Each protein has its own specific number and sequence of amino acids. Amino acids can be classified as either essential or non-essential. Non-essential amino acids can be produced in the body from other proteins or carbohydrates. Essential amino acids, however, cannot be produced during metabolism by the body and therefore must be provided by our diet. Eight amino acids (Leucine, Isoleucine, Valine, Threonine, Methionine, Phenylalanine, Tryptophan and Lysine) are considered essential for adults, while nine (those mentioned above plus Histidine) are considered essential for children. When a protein contains the essential amino acids in a proportion similar to that required by humans, we say that it has high biological value. When one or more essential amino acids are scarce, the protein is said to have low biological value. The amino acid that is in shortest supply in relation to need is termed the limiting amino acid. The limiting amino acid tends to be different in different proteins, so when two foods providing vegetable protein are eaten at a meal, such as a cereal (e.g. bread) and a pulse (e.g. baked beans), the amino acids of one protein may compensate for the limitations of the other, resulting in a combination of higher biological value. High biological value proteins are provided by animal sources of protein, such as meat, poultry, fish, eggs, milk, cheese and yogurt. Low biological value proteins are found in plants, legumes, grains, nuts, seeds and vegetables.
human milk
Lipids are insoluble in water and found in biological membranes.
Yes! The structure of the protein is basically its shape and is one of the major things which determine how it can interact with other proteins.
In prokaryotic organisms, most of the control over protein synthesis occurs at the level of transcription initiation. This is often true for eukaryotes as well.
glubour
If a proteins shape is changed it has likely been denatured. This is often a breakdown and rearrangement of the protein.
Inorganic elements of biological materials are components that are not naturally produced. This is often used to reference molecules in chemistry that are synthetic or man made.
"ase" is often used in biological systems where a substance is broken down. Lactose in milk is broken down by lact"ase". "ase" is usually an indicator of a certain biological enzyme made of protein.
To scale a building means to climb it by means of a ladder, or to reach the highest point. This term is often used in reference to attacking a castle - to "scale a castle wall" when attacking.
That protein is called denatured.
A person who provides a reference is often referred to as a referee.
Yes. Meats are mostly protein - often with some fat as well.
"Moonhigh" refers to the time when the moon is at its highest point in the sky during the night. In some cultures, it is considered a mystical or magical time, while in practical terms, it can also be a reference point for tracking time during the night.
An internet reference is a citation of an online source in a bibliography. It often takes the form of a URL.
Anne Sullivan often used the Bible as a reference book while teaching Helen Keller.
A document, often organized alphabetically, designed as a quick reference for experienced users.
A document, often organized alphabetically, designed as a quick reference for experienced users.
If a virus has one, yes, and it's often referred to as a "protein coat."