Properties of Some Minor Protein Components of Muscle

　It is now generally accepted that the system actin, myosin and adenosinetriphosphate contains the essential components of the contractile mechanism of muscle. In spite of the efforts of dozens of investigators working through nearly two decades, the nature of the interaction of the three remains a source of fascination as well as a challenge to all who are interested in the problem of the chemistry of muscle contraction.

　The present communication is not concerned with this system, and in a sense it might be unrelated to the central theme of the Conference.