The Deaminase Properties of Myosin

　Ferdman and Nechiporenko（1946）expressed the view that myosin possesses the property to deaminate ATP and AMP．Attention was thus drawn again to Embden's claims that the principal chemical reaction underlying muscular contraction is alkalinization of the tissuea concept opposed by Meyerhof and Parnas．The shift of reaction would be the result of deaminase activity．This controversy was resolved in favour of Meyerhof and Parnas, while Embden's concept has gradually become obsolete．The abovementioned statements of Ferdman and Nechiporenko led to a reconsideration of the problem．