A cardinal method for protein structure research is x-ray analysis, which is known as x-ray crystallography. Protein crystallography is considered to be just a section of x-ray crystallography but it is really significant. Protein crystallography does allow describing protein secondary structure and afterward triple structure of protein. On the basis of x-ray crystallography the quaternary structure of protein can be described. The capability of protein texture determination depends from lots of different factors. Folding of protein is the cardinal structural characteristic of protein molecule. The protein is very wonderful substance, because all the information about it is stored and folded in its basic texture. So a lot of scientists worldwide attempt to examine the proteins more correctly. On the ground of protein sequence, it is a possibility to carry out research of protein and define many various protein properties, such as classification of protein, protein function and a lot of others and just learn more about function of protein. Even having got a modern technologies and superb devices the basic problem is not worked out. There is some definite connections between the structure of protein and its primary structure, but they haven't been specified. For very short proteins, which named peptides, this problem is worked out. Scientists reach success in the sphere of peptide classification. Now it is possible to perform the peptide synthesis operation for any size peptides.

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