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Kollagena. Are extremely widespread in live organisms. From kollagen sos-connecting fabric conceals; they are in cartilages. Bones of vertebrate animals consist of inorganic substances (fosfornokisly and carbonic calcium), fat and kollagen.

Proteins carry out function of biocatalysts enzymes, the speed and the direction of chemical reactions in an organism. In a complex with nucleinic acids provide functions of growth and transfer of hereditary signs, are a structural basis of muscles and muscular contraction.

When heating casein does not turn. At effect of acids it is allocated for casein salts in a free look. Folding of milk is explained by it at prokisa-scientific research institute. From other fosforoprotein it should be noted which is in an egg yolk.

Proteins, breaking up in an organism, are, just as carbohydrates and fats, a power source. The energy received at disintegration of proteins can be compensated without any damage to an organism by energy of disintegration of fats and carbohydrates. However it is very important that a human body and animals cannot do without regular intake of proteins from the outside.

Globulins. They are insoluble in water, but are dissolved in very weak rastvo-ra of salts. Can be examples of globulins: fibrinogen, globulin of blood serum, globulin of muscular fabric, globulin of protein of egg.

Prolamina. Are in grains of various grain cereals. Their remarkable feature is solubility in 80% - number alcohol. The representative of these it is white - the gliadine making a gluten body can serve.

Special character of protein of each look is connected not only with length, structure and a structure of the polypeptide chains entering its molecule, but also how these chains are guided. Distinguish four levels of the organization of proteinaceous molecules: Primary structure of protein — sequence of the amino-acid remains in a polypeptide chain. The proteinaceous molecule can consist of one or several polypeptide chains, each of which contains various number of the amino-acid remains. A variety of proteins is almost boundless, but not all from them exist in the nature.

In each living cell there are continuously hundreds of biochemical reactions. Fast course of these reactions is provided by biological catalysts, or accelerators of reactions, – enzymes. More than one thousand different enzymes is known. All of them are squirrels.

Albumine. They are rastvorima in water, are curtailed when heating, are neutral, are rather difficult besieged by solutions of salts. Can be their examples: albumine of protein of egg, albumine of blood serum, albumine muskul-ache fabrics, dairy albumine.

Glikoproteida. Some proteins of this group meet in mucous connections of animal organisms and properties of these allocations to last in a thread even at rather big dilution are caused. These proteins are formed in submaxillary gland, a liver, glands of a stomach and intestines. Other glikoproteida are in cartilages, egg white, a vitreous body of an eye, etc. The studied representatives of glikoproteid are a combination of proteins to the substances containing the remains of some derivative carbohydrates, sulfuric and acetic acids.

The polypeptide chains or separate sites constructed thus in a polypeptide chain can be in addition connected in some cases among themselves disulfide (– S-S-YoYoYo) by communications, or as often call them, disulfide bridges.

Process of splitting or synthesis of any substance in a cage, as a rule, razde-flax on a number of chemical operations. Each operation is carried out by separate enzyme. The group of such enzymes makes some kind of biochemical conveyor.