There are lots ways to determine the structure of protein, but the most proper is x-ray dissection. Protein crystallography is considered to be just a section of x-ray crystallography but it is really important. Protein crystallography is a perfect method of studying more about the secondary, and as it found out threefold structure of protein. On the basis of x-ray crystallography the quaternary texture of protein can be described. Sometimes protein displays its various features, it depends on conditions. The main properties of protein is the protein folding. Nowadays many scientists try to complete the complex analysis of the protein function. They have already proved thoroughly that all the important information of protein can be found in its basic structure or in protein sequence. A lot of quite important properties of protein as protein classification, its function are still can not be learned because of shortage of knowledge about it, so we should learn more about protein problem. There are a lot of protein problems that are not worked out in spite of the present achievements. There is some determined relations between the structure of protein and its primary structure, but they can not be described. For very little, that named peptides, this problem is worked out. Scientists achieve success in the sphere of peptides. At the moment it is feasible to fulfill the peptide synthesis operation for any length peptides.

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