There are apparently three chief routes by which chemists may seek to learn the structure of the proteid molecule. First, by decomposing it, collecting the products of decomposition and studying their structure, quantity and possible groupings. Second, by splitting the proteid molecule step by step, so that the main groups can be determined and studied each by itself. Third, by synthesizing the proteid molecule. This, of course, is not to be done at one step, but first the ultimate splitting products are to be synthesized, than these joined to form the higher groups, and so on. Hopeless as this problem may seem to the practical physician, yet there are enormous energies directed toward its solution, and encouraging progress is undoubtedly being made. This, however, by no means implies that the goal is near. Two important centers of work on the structure of the proteid molecule are the laboratories of Emil
THE CHEMISTRY OF THE PROTEID MOLECULE.. JAMA. 1905;XLIV(2):130. doi:10.1001/jama.1905.02500290050003
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