Brief description of the physical, chemical and physico-chemical properties of the protein
The properties of the protein molecules are important for the realization of their biological and ecological characteristics. Thus, the state of aggregation proteins referred to as solid substances which may be soluble or insoluble in water or other solvents. Much of bioecological as determined by the physical properties of proteins. Thus, the ability of the protein molecules to form colloidal systems responsible for their construction, and other catalytic functions. The insolubility of proteins in water and other solvents, their fibrillar causes the forming and protective functions, and so on. D.
By physico-chemical properties of proteins is their ability to denature and coagulate. Coagulation appears in colloidal systems, which are the basis of every living substance. When coagulation particles become larger due to their adhesion. Coagulation is hidden (it can be seen only under a microscope) and explicit – it is a sign of precipitation of protein. Coagulation is irreversible, when, after termination of the coagulation factor structure of the colloidal system is not restored, and reversible when the coagulation factor after removing colloidal system is restored.
An example of coagulation is reversible loss of egg albumin protein under the action of salt solutions, wherein the protein precipitate is dissolved in a solution or dilution in transferring the precipitate in distilled water.
An example of coagulation is irreversible disruption of the colloidal structure of the protein albumin by heating to the boiling point of water. When death (total) living matter transformed into dead by the irreversible coagulation of the entire system.
The chemical properties of proteins are diverse because of the presence of protein molecules in a large number of functional groups and also by the presence of peptide bonds, and other protein molecules. Since ecological and biological products the most important is the ability of the protein molecules to hydrolysis (the ultimately obtained a mixture of natural alpha amino acids which participated in the formation of the molecule in the mixture may be other substances, if the protein was proteids) Oxidation (its products can be carbon dioxide, water and nitrogen compounds such as urea, phosphorus compounds and the like. d.).
Proteins are burning with the release of smell “burnt horn” or “burnt feathers,” you need to know during the simplest of environmental experiments. Various color reactions to the protein (biuret, ksantoproteinovaya etc.), More of them – in the course of chemistry.
Brief description of ecological and biological functions of proteins
It is necessary to distinguish between the ecological and biological role of proteins in cells and in the body as a whole.
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