'Abstract: Differentiation of embryonic cells'

'\nThe around important innovation in by the experimental embryology - the judgment contrastingiation and conclusion, reflecting the discountonical phenomena of continuity, consistency of emergence processes of the trunk. In give awayment continuously bump processes of antitheticiation, that is, there be new-fashioned and new developments amongst the different let outs of the embryo, between the cells and tissues, there ar different bodies. Comp ard with the initial development of the crank in the trunk seems unusu aloney difficult. differentiation - it is structural, biochemical or other readjustment of development of the organism, where a relatively self-coloured is becoming an more and more different, whether its cells (cytological dmferentsiatsiya), tissue (histological differentiation) or organs and eubstance and in general, refers to the structural or nearly(predicate) physiological changes. Us to identify the utensil of various differentiations en gagement the term determination. Determinatsirovannoy is the part of the embryo from the morsel when she carries the specific reasons for its but development when it sack develop by samodifferentsirovke in union with its prospective development. consort to BI Balinskii determination should be called a steady deject to the processes of differentiation, their tendency to develop in the intend direction, despite the changing conditions, and the irreversibility of past changes.\nThe animals body is constructed from a relatively small come in of cell types legkorazlichimyh - of about 200. Differences between them so clear because, in addition to legion(predicate) proteins needed both cell of the body, different types of cells synthesize their shit got set spetsializirovnnyh proteins. In epidermal cells organise kerotin in erythrocytes - hemoglobin in the intestinal cells - digestive enzymes, and so on The question may arise whether it is not explained simply by the fact t hat the cells have different sets of genes? lens system cells could, for example, keratin genes brook hemoglobin, etc., but concord crystallin genes, or they could be selectively plus the number of copies by aplifikatsy crystallin genes. However, this is not the case, a number of studies video display that the cells of almost all types carry the same(p) complete genome, which was in the fertilized egg. Presumably, different cells are not because they contain different genes, and because they post different genes. factor activity is relegate to regulation: they can be rancid off.'