proto-, prot- +
(Greek: first; foremost, front, earliest form of, original, primitive; chief, principal; usually used as a prefix)
The amniotic fluid level can be used to assess fetal development. Increased serum levels are found in adults with certain kinds of liver diseases.
2. Protein with linear or branched oligosaccharides (simple sugars) covalently bonded to it.
Examples include nearly all surface proteins of animal cells and many proteins circulating in blood.
2. An excess of lipoproteins (any of the lipid-protein, or fat-protein, complexes in which lipids or fats exist) in the blood, due to a disorder of lipoprotein metabolism.
It may be acquired or hereditary. Acquired forms accompany other disorders or may be caused by environmental factors such as diet.
There are a number of different hereditary forms, classified according to clinical features, enzymatic abnormalities, and serum lipoprotein patterns.
2. A molecule that is a combination of lipid and protein.
Lipids don't travel in the blood by themselves; however, they are carried through the bloodstream as lipoproteins.
2. Any of a group of organic compounds; such as, the mucins, that consist of a complex of proteins and glycosaminoglycans and are found in body tissues and fluids.
Proteins are required for the structure, function, and regulation of the body's cells, tissues, and organs. Each protein has unique functions. Proteins are essential components of muscles, skin, bones and the body as a whole.
Examples of proteins include whole classes of important molecules, among them enzymes, hormones, and antibodies.
Protein is one of the three types of nutrients used as energy sources by the body, the other two being carbohydrate and fat. Proteins and carbohydrates each provide four calories of energy per gram, while fats produce nine calories per gram.
The word "protein" was introduced into science by the great Swedish physician and chemist, Jöns Jacob Berzelius (1779-1848), who also determined the atomic and molecular weights of thousands of substances, discovered several elements including selenium, first isolated silicon and titanium, and created the present system of writing chemical symbols and reactions.
Etymology: from French protéine, from Greek proteios, "the first quality"; from protos, "first". Originally a theoretical substance thought to be essential to life, the modern use is from German Protein, borrowed in English about 1907.
They are transported via the portal vein to the liver and then into the general circulation and to the tissues.
Each tissue synthesizes its own form of protein from the amino acids received from the blood.
They are found primarily in connective tissue and cartilage.2. Any of a group of glycoproteins in connective-body tissue, made of carbohydrates and protein.
They serve as binding or cementing materials for body tissues.
It is the set of expressed proteins in a given type of cells or an organism at a given time under specifically defined conditions.
The proteome is the totality of proteins (expressed genes) in an organism, tissue type or cell, and proteomics is now well-established as a term for studying the proteome.