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protein    音标拼音: [pr'ot,in]
n. 蛋白质
a. 蛋白质的

蛋白质蛋白质的

protein
n 1: any of a large group of nitrogenous organic compounds that
are essential constituents of living cells; consist of
polymers of amino acids; essential in the diet of animals
for growth and for repair of tissues; can be obtained from
meat and eggs and milk and legumes; "a diet high in
protein"

Protein \Pro"te*in\, n. (Physiol. Chem.)
In chemical analysis, the total nitrogenous material in
vegetable or animal substances, obtained by multiplying the
total nitrogen found by a factor, usually 6.25, assuming most
proteids to contain approximately 16 per cent of nitrogen.
[Webster 1913 Suppl.]


Proteid \Pro"te*id\, n. [Gr. prw^tos first.] (Physiol. Chem.)
An older, imprecise term replaced by {{protein}}.

Note: Proteid was defined in the 1913 Webster as "One of a
class of amorphous nitrogenous principles, containing,
as a rule, a small amount of sulphur; an albuminoid, as
blood fibrin, casein of milk, etc. Proteids are present
in nearly all animal fluids and make up the greater
part of animal tissues and organs. They are also
important constituents of vegetable tissues. See 2d
Note under {Food}." -- {Pro"te*id}, a.

Syn: protein.
[1913 Webster PJC]

{Defensive proteid} (Physiol. Chem.), one of a class of
proteid substances, present in some animal tissues and
fluids, that make the body immune to certain infectious
diseases by destroying or rendering inactive the toxic
products of bacterial growth; -- this is an older term
replaced by more precise modern immunological concepts
such as {antibody} and {immunoglobulin}. [archaic]
[Webster 1913 Suppl. PJC]


Protein \Pro"te*in\, n. [Gr. prw^tos first: cf. prwtei^on the
first place.] (Physiol. Chem.)
any polymer of an amino acid joined by peptide (amide) bonds.
Most natural proteins have alpha-amino acids as the monomeric
constituents. All classical enzymes are composed of protein,
and control most of the biochemical transformations carrie
dout in living cells. They may be soluble, as casein,
albumins, and other globular proteins, or insoluble (e. g.
"structural proteins"), as collagen or keratin. "albumin", an
older term for protein, is now used primarily to refer to
certain specific soluble globular proteins found in eggs or
blood serum, e.g. {bovine serum albumin}, the main soluble
protein in teh serum of cattle, used as an enzymatically
inert protein in biochemical research.

Note: In the 1913 dictionary, protein was defined as: "A body
now known as alkali albumin, but originally considered
to be the basis of all albuminous substances, whence
its name."
[1913 Webster PJC]

{Protein crystal}. (Bot.) See {Crystalloid}, n., 2.
[1913 Webster]


macromolecule \mac`ro*mol"e*cule\, n. (Chem., Biochem.)
A very large molecule, especially a polymer having from
hundreds to many thousands of atoms, such as {DNA}, {RNA},
{protein}, {polysaccharide}, {polyethylene}, {polycarbonate},
etc.
[PJC]


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  • Proteins and Polypeptides – Basics, Structures, Functions, and Properties
    According to IUPAC, polypeptides with a molecular mass of 10,000 Da or more are classified as proteins At times, the term 'proteins' refers to molecules with 50-100 combined amino acids Each protein contains one or more polypeptide chain
  • What Are Proteins? Definition, Types Examples
    People generally say “protein” (or “dietary protein”) when talking about nutrition and “proteins” when discussing the science of how the individual molecules work within your body
  • Protein - Wikipedia
    Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues
  • Protein • The Nutrition Source
    Protein is found throughout the body—in muscle, bone, skin, hair, and virtually every other body part or tissue It makes up the enzymes that power many chemical reactions and the hemoglobin that carries oxygen in your blood
  • What Protein Does for Your Body and If Youre Getting Enough
    Proteins are made up of amino acids and are found in every cell of the body Protein is essential for bone, muscle, digestive and metabolic health For optimal health, enjoy a variety of protein sources, such as nuts, beans, fish and poultry
  • Protein | Definition, Structure, Classification | Britannica
    A protein is a naturally occurring, extremely complex substance that consists of amino acid residues joined by peptide bonds Proteins are present in all living organisms and include many essential biological compounds such as enzymes, hormones, and antibodies
  • Protein: Why Your Body Needs It - WebMD
    Your body needs protein to stay healthy and work the way it should More than 10,000 types are found in everything from your organs to your muscles and tissues to your bones, skin, and hair
  • What is protein? High protein foods, explained by nutritionists
    What is protein? Protein is one of the body’s three macronutrients, along with carbohydrates and fat Each provides calories and energy, but they serve different purposes
  • Protein: What’s Enough? - American Heart Association
    Most people can meet their needs by enjoying a variety of protein sources, favoring plant-based foods like beans, lentils, nuts, seeds and soy, adding fish and seafood and including lean or skinless meat and poultry in smaller amounts if desired





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