A main method for protein structure determination is x-ray analysis, which is named x-ray crystallography. Really, the protein crystallography is not detached part, but it is very important section of x-ray crystallography. Protein crystallography does allow defining protein secondary structure and subsequently threefold structure of protein. Usually, on the basis of protein crystallography information it is possible do define the protein quaternary texture, but it is not always the case. Lots of various circumstances can affect the studying of protein structure. The cardinal properties of protein is the protein folding. According to all analysisses, all data about protein folding is stored in the protein primary texture, or in protein succession, that is why it is necessary to begin any proteins research from defining of sequence of protein. Read the rest of this entry »