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protein    音標拼音: [pr'ot,in]
n. 蛋白質
a. 蛋白質的

蛋白質蛋白質的

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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英文字典中文字典相關資料:
  • Proteins and Polypeptides – Basics, Structures, Functions, and Properties
    Proteins are organic compounds that contain four elements: nitrogen, carbon, hydrogen, and oxygen To comprehend the full scope of proteins, it is crucial to understand various properties, including the basic biological molecule, peptides, polypeptide chains, amino acids, protein structures, and the processes of protein denaturation
  • High Protein Foods: 16 Foods for High Protein Meals - Healthline
    Foods that are highest in protein typically include lean meat, poultry, and seafood But you can also get protein from eggs, beans, nuts, seeds, and soy products
  • Protein: What It Is, Types, Uses, Needs, Deficiency - Verywell Health
    A protein is a large, complex molecule that is a key building block of life We all know that it is an important part of our diets, but how many of us know how protein actually works in our bodies, and why we need it?
  • Protein - The Nutrition Source
    Protein is an essential macronutrient, but not all food sources of protein are created equal, and you may not need as much as you think Learn the basics about protein and shaping your diet with healthy protein foods
  • Protein | Definition, Structure, Classification | Britannica
    protein, highly complex substance that is present in all living organisms Proteins are of great nutritional value and are directly involved in the chemical processes essential for life
  • What Protein Does for Your Body and If Youre Getting Enough - EatingWell
    “Protein is a macronutrient that every cell in our body needs Proteins are made up of building blocks called amino acids, and protein is found in every cell throughout our body, so an adequate amount of protein intake is important for keeping our muscles, bones and tissues healthy,” says Kristen Smith, M S , RDN Other macronutrients
  • Protein: Why Your Body Needs It - WebMD
    Your body needs protein to work the way it should Learn the recommended amount you need and best sources
  • 3. 7: Proteins - Biology LibreTexts
    Amino Acids and Peptide Bonds An amino acid is an organic molecule in which a hydrogen atom, a carboxyl group (–COOH), and an amino group (–NH 2) are all bonded to the same carbon atom, the so-called α carbon The fourth group bonded to the α carbon varies among the different amino acids and is called a residue or a side chain, represented in structural formulas by the letter R





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